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Finding the Fourth Proportional to 124,989.84, 172,465.44 and 71,275.92

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Solution

The fourth proportional to 124,989.84, 172,465.44 and 71,275.92 is: 98,349.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,989.84 : 172,465.44 = 71,275.92 : x
  2. Step 2: Convert to fraction form
    124,989.84/172,465.44 = 71,275.92/x
  3. Step 3: Cross multiply
    124,989.84x = 172,465.44 × 71,275.92
  4. Step 4: Simplify right side
    124,989.84x = 12,292,632,904.20
  5. Step 5: Solve for x
    x = 12,292,632,904.20/124,989.84
  6. Step 6: Final answer
    x = 98,349.06

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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.