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Finding the Fourth Proportional to 65,397.71, 90,251.81 and 38,541.35

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Solution

The fourth proportional to 65,397.71, 90,251.81 and 38,541.35 is: 53,188.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,397.71 : 90,251.81 = 38,541.35 : x
  2. Step 2: Convert to fraction form
    65,397.71/90,251.81 = 38,541.35/x
  3. Step 3: Cross multiply
    65,397.71x = 90,251.81 × 38,541.35
  4. Step 4: Simplify right side
    65,397.71x = 3,478,425,953.38
  5. Step 5: Solve for x
    x = 3,478,425,953.38/65,397.71
  6. Step 6: Final answer
    x = 53,188.81

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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.