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Finding the Fourth Proportional to 65,683.62, 90,610.92 and 38,813.13

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Solution

The fourth proportional to 65,683.62, 90,610.92 and 38,813.13 is: 53,542.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,683.62 : 90,610.92 = 38,813.13 : x
  2. Step 2: Convert to fraction form
    65,683.62/90,610.92 = 38,813.13/x
  3. Step 3: Cross multiply
    65,683.62x = 90,610.92 × 38,813.13
  4. Step 4: Simplify right side
    65,683.62x = 3,516,893,417.38
  5. Step 5: Solve for x
    x = 3,516,893,417.38/65,683.62
  6. Step 6: Final answer
    x = 53,542.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.