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Finding the Fourth Proportional to 124,624.64, 172,125.41 and 90,784.46

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Solution

The fourth proportional to 124,624.64, 172,125.41 and 90,784.46 is: 125,387.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,624.64 : 172,125.41 = 90,784.46 : x
  2. Step 2: Convert to fraction form
    124,624.64/172,125.41 = 90,784.46/x
  3. Step 3: Cross multiply
    124,624.64x = 172,125.41 × 90,784.46
  4. Step 4: Simplify right side
    124,624.64x = 15,626,312,375.52
  5. Step 5: Solve for x
    x = 15,626,312,375.52/124,624.64
  6. Step 6: Final answer
    x = 125,387.02

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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.