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Finding the Fourth Proportional to 169,701.60, 254,206.80 and 86,642.40

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Solution

The fourth proportional to 169,701.60, 254,206.80 and 86,642.40 is: 129,787.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,701.60 : 254,206.80 = 86,642.40 : x
  2. Step 2: Convert to fraction form
    169,701.60/254,206.80 = 86,642.40/x
  3. Step 3: Cross multiply
    169,701.60x = 254,206.80 × 86,642.40
  4. Step 4: Simplify right side
    169,701.60x = 22,025,087,248.32
  5. Step 5: Solve for x
    x = 22,025,087,248.32/169,701.60
  6. Step 6: Final answer
    x = 129,787.15

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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.