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Finding the Fourth Proportional to 172,899.60, 259,306.20 and 66,260.40

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Solution

The fourth proportional to 172,899.60, 259,306.20 and 66,260.40 is: 99,374.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,899.60 : 259,306.20 = 66,260.40 : x
  2. Step 2: Convert to fraction form
    172,899.60/259,306.20 = 66,260.40/x
  3. Step 3: Cross multiply
    172,899.60x = 259,306.20 × 66,260.40
  4. Step 4: Simplify right side
    172,899.60x = 17,181,732,534.48
  5. Step 5: Solve for x
    x = 17,181,732,534.48/172,899.60
  6. Step 6: Final answer
    x = 99,374.04

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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.