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Finding the Fourth Proportional to 65,397.84, 90,247.32 and 38,179.14

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Solution

The fourth proportional to 65,397.84, 90,247.32 and 38,179.14 is: 52,686.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,397.84 : 90,247.32 = 38,179.14 : x
  2. Step 2: Convert to fraction form
    65,397.84/90,247.32 = 38,179.14/x
  3. Step 3: Cross multiply
    65,397.84x = 90,247.32 × 38,179.14
  4. Step 4: Simplify right side
    65,397.84x = 3,445,565,064.90
  5. Step 5: Solve for x
    x = 3,445,565,064.90/65,397.84
  6. Step 6: Final answer
    x = 52,686.22

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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.