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Finding the Fourth Proportional to 124,843.68, 172,374.48 and 77,162.40

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Solution

The fourth proportional to 124,843.68, 172,374.48 and 77,162.40 is: 106,539.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,843.68 : 172,374.48 = 77,162.40 : x
  2. Step 2: Convert to fraction form
    124,843.68/172,374.48 = 77,162.40/x
  3. Step 3: Cross multiply
    124,843.68x = 172,374.48 × 77,162.40
  4. Step 4: Simplify right side
    124,843.68x = 13,300,828,575.55
  5. Step 5: Solve for x
    x = 13,300,828,575.55/124,843.68
  6. Step 6: Final answer
    x = 106,539.86

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1.5x scale

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.