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Finding the Fourth Proportional to 91,703.85, 137,555.78 and 83,830.65

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Solution

The fourth proportional to 91,703.85, 137,555.78 and 83,830.65 is: 125,745.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,703.85 : 137,555.78 = 83,830.65 : x
  2. Step 2: Convert to fraction form
    91,703.85/137,555.78 = 83,830.65/x
  3. Step 3: Cross multiply
    91,703.85x = 137,555.78 × 83,830.65
  4. Step 4: Simplify right side
    91,703.85x = 11,531,390,029.50
  5. Step 5: Solve for x
    x = 11,531,390,029.50/91,703.85
  6. Step 6: Final answer
    x = 125,745.98

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.