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Finding the Fourth Proportional to 66,767.72, 92,138.10 and 38,471.72

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Solution

The fourth proportional to 66,767.72, 92,138.10 and 38,471.72 is: 53,090.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,767.72 : 92,138.10 = 38,471.72 : x
  2. Step 2: Convert to fraction form
    66,767.72/92,138.10 = 38,471.72/x
  3. Step 3: Cross multiply
    66,767.72x = 92,138.10 × 38,471.72
  4. Step 4: Simplify right side
    66,767.72x = 3,544,711,184.53
  5. Step 5: Solve for x
    x = 3,544,711,184.53/66,767.72
  6. Step 6: Final answer
    x = 53,090.19

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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.