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Finding the Fourth Proportional to 99,656.80, 137,521.20 and 61,930.24

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Solution

The fourth proportional to 99,656.80, 137,521.20 and 61,930.24 is: 85,460.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,656.80 : 137,521.20 = 61,930.24 : x
  2. Step 2: Convert to fraction form
    99,656.80/137,521.20 = 61,930.24/x
  3. Step 3: Cross multiply
    99,656.80x = 137,521.20 × 61,930.24
  4. Step 4: Simplify right side
    99,656.80x = 8,516,720,921.09
  5. Step 5: Solve for x
    x = 8,516,720,921.09/99,656.80
  6. Step 6: Final answer
    x = 85,460.51

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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.