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Finding the Fourth Proportional to 99,534.80, 149,129.40 and 64,456.40

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Solution

The fourth proportional to 99,534.80, 149,129.40 and 64,456.40 is: 96,572.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,534.80 : 149,129.40 = 64,456.40 : x
  2. Step 2: Convert to fraction form
    99,534.80/149,129.40 = 64,456.40/x
  3. Step 3: Cross multiply
    99,534.80x = 149,129.40 × 64,456.40
  4. Step 4: Simplify right side
    99,534.80x = 9,612,344,258.16
  5. Step 5: Solve for x
    x = 9,612,344,258.16/99,534.80
  6. Step 6: Final answer
    x = 96,572.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.