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Finding the Fourth Proportional to 88,612.60, 132,935.72 and 28,657.20

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Solution

The fourth proportional to 88,612.60, 132,935.72 and 28,657.20 is: 42,991.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,612.60 : 132,935.72 = 28,657.20 : x
  2. Step 2: Convert to fraction form
    88,612.60/132,935.72 = 28,657.20/x
  3. Step 3: Cross multiply
    88,612.60x = 132,935.72 × 28,657.20
  4. Step 4: Simplify right side
    88,612.60x = 3,809,565,515.18
  5. Step 5: Solve for x
    x = 3,809,565,515.18/88,612.60
  6. Step 6: Final answer
    x = 42,991.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.