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Finding the Fourth Proportional to 98,957.52, 136,742.20 and 72,053.16

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Solution

The fourth proportional to 98,957.52, 136,742.20 and 72,053.16 is: 99,565.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,957.52 : 136,742.20 = 72,053.16 : x
  2. Step 2: Convert to fraction form
    98,957.52/136,742.20 = 72,053.16/x
  3. Step 3: Cross multiply
    98,957.52x = 136,742.20 × 72,053.16
  4. Step 4: Simplify right side
    98,957.52x = 9,852,707,615.35
  5. Step 5: Solve for x
    x = 9,852,707,615.35/98,957.52
  6. Step 6: Final answer
    x = 99,565.02

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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.