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Finding the Fourth Proportional to 124,900.56, 172,359.12 and 68,310.72

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Solution

The fourth proportional to 124,900.56, 172,359.12 and 68,310.72 is: 94,266.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,900.56 : 172,359.12 = 68,310.72 : x
  2. Step 2: Convert to fraction form
    124,900.56/172,359.12 = 68,310.72/x
  3. Step 3: Cross multiply
    124,900.56x = 172,359.12 × 68,310.72
  4. Step 4: Simplify right side
    124,900.56x = 11,773,975,585.77
  5. Step 5: Solve for x
    x = 11,773,975,585.77/124,900.56
  6. Step 6: Final answer
    x = 94,266.80

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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.