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Finding the Fourth Proportional to 91,743.80, 137,702.10 and 56,751.80

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Solution

The fourth proportional to 91,743.80, 137,702.10 and 56,751.80 is: 85,181.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,743.80 : 137,702.10 = 56,751.80 : x
  2. Step 2: Convert to fraction form
    91,743.80/137,702.10 = 56,751.80/x
  3. Step 3: Cross multiply
    91,743.80x = 137,702.10 × 56,751.80
  4. Step 4: Simplify right side
    91,743.80x = 7,814,842,038.78
  5. Step 5: Solve for x
    x = 7,814,842,038.78/91,743.80
  6. Step 6: Final answer
    x = 85,181.15

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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.