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Finding the Fourth Proportional to 61,358.40, 84,646.89 and 38,681.64

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Solution

The fourth proportional to 61,358.40, 84,646.89 and 38,681.64 is: 53,363.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,358.40 : 84,646.89 = 38,681.64 : x
  2. Step 2: Convert to fraction form
    61,358.40/84,646.89 = 38,681.64/x
  3. Step 3: Cross multiply
    61,358.40x = 84,646.89 × 38,681.64
  4. Step 4: Simplify right side
    61,358.40x = 3,274,280,526.10
  5. Step 5: Solve for x
    x = 3,274,280,526.10/61,358.40
  6. Step 6: Final answer
    x = 53,363.20

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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.