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Finding the Fourth Proportional to 123,038.50, 169,793.16 and 66,449.89

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Solution

The fourth proportional to 123,038.50, 169,793.16 and 66,449.89 is: 91,700.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,038.50 : 169,793.16 = 66,449.89 : x
  2. Step 2: Convert to fraction form
    123,038.50/169,793.16 = 66,449.89/x
  3. Step 3: Cross multiply
    123,038.50x = 169,793.16 × 66,449.89
  4. Step 4: Simplify right side
    123,038.50x = 11,282,736,804.75
  5. Step 5: Solve for x
    x = 11,282,736,804.75/123,038.50
  6. Step 6: Final answer
    x = 91,700.86

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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.