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Finding the Fourth Proportional to 65,561.32, 90,507.56 and 38,712.24

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Solution

The fourth proportional to 65,561.32, 90,507.56 and 38,712.24 is: 53,442.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,561.32 : 90,507.56 = 38,712.24 : x
  2. Step 2: Convert to fraction form
    65,561.32/90,507.56 = 38,712.24/x
  3. Step 3: Cross multiply
    65,561.32x = 90,507.56 × 38,712.24
  4. Step 4: Simplify right side
    65,561.32x = 3,503,750,384.53
  5. Step 5: Solve for x
    x = 3,503,750,384.53/65,561.32
  6. Step 6: Final answer
    x = 53,442.34

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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.