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Finding the Fourth Proportional to 111,591.68, 153,931.20 and 75,355.52

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Solution

The fourth proportional to 111,591.68, 153,931.20 and 75,355.52 is: 103,946.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,591.68 : 153,931.20 = 75,355.52 : x
  2. Step 2: Convert to fraction form
    111,591.68/153,931.20 = 75,355.52/x
  3. Step 3: Cross multiply
    111,591.68x = 153,931.20 × 75,355.52
  4. Step 4: Simplify right side
    111,591.68x = 11,599,565,620.22
  5. Step 5: Solve for x
    x = 11,599,565,620.22/111,591.68
  6. Step 6: Final answer
    x = 103,946.51

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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.