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Finding the Fourth Proportional to 110,489.76, 152,602.56 and 72,931.68

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Solution

The fourth proportional to 110,489.76, 152,602.56 and 72,931.68 is: 100,729.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,489.76 : 152,602.56 = 72,931.68 : x
  2. Step 2: Convert to fraction form
    110,489.76/152,602.56 = 72,931.68/x
  3. Step 3: Cross multiply
    110,489.76x = 152,602.56 × 72,931.68
  4. Step 4: Simplify right side
    110,489.76x = 11,129,561,073.10
  5. Step 5: Solve for x
    x = 11,129,561,073.10/110,489.76
  6. Step 6: Final answer
    x = 100,729.34

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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.