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Finding the Fourth Proportional to 112,812.60, 169,218.90 and 100,565.40

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Solution

The fourth proportional to 112,812.60, 169,218.90 and 100,565.40 is: 150,848.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,812.60 : 169,218.90 = 100,565.40 : x
  2. Step 2: Convert to fraction form
    112,812.60/169,218.90 = 100,565.40/x
  3. Step 3: Cross multiply
    112,812.60x = 169,218.90 × 100,565.40
  4. Step 4: Simplify right side
    112,812.60x = 17,017,566,366.06
  5. Step 5: Solve for x
    x = 17,017,566,366.06/112,812.60
  6. Step 6: Final answer
    x = 150,848.10

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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.