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Finding the Fourth Proportional to 123,036.60, 169,787.70 and 75,289.80

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Solution

The fourth proportional to 123,036.60, 169,787.70 and 75,289.80 is: 103,898.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,036.60 : 169,787.70 = 75,289.80 : x
  2. Step 2: Convert to fraction form
    123,036.60/169,787.70 = 75,289.80/x
  3. Step 3: Cross multiply
    123,036.60x = 169,787.70 × 75,289.80
  4. Step 4: Simplify right side
    123,036.60x = 12,783,281,975.46
  5. Step 5: Solve for x
    x = 12,783,281,975.46/123,036.60
  6. Step 6: Final answer
    x = 103,898.21

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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.