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Finding the Fourth Proportional to 91,709.70, 137,345.85 and 91,709.70

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Solution

The fourth proportional to 91,709.70, 137,345.85 and 91,709.70 is: 137,345.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,709.70 : 137,345.85 = 91,709.70 : x
  2. Step 2: Convert to fraction form
    91,709.70/137,345.85 = 91,709.70/x
  3. Step 3: Cross multiply
    91,709.70x = 137,345.85 × 91,709.70
  4. Step 4: Simplify right side
    91,709.70x = 12,595,946,699.75
  5. Step 5: Solve for x
    x = 12,595,946,699.75/91,709.70
  6. Step 6: Final answer
    x = 137,345.85

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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.