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Finding the Fourth Proportional to 86,545.60, 129,818.40 and 81,296.80

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Solution

The fourth proportional to 86,545.60, 129,818.40 and 81,296.80 is: 121,945.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,545.60 : 129,818.40 = 81,296.80 : x
  2. Step 2: Convert to fraction form
    86,545.60/129,818.40 = 81,296.80/x
  3. Step 3: Cross multiply
    86,545.60x = 129,818.40 × 81,296.80
  4. Step 4: Simplify right side
    86,545.60x = 10,553,820,501.12
  5. Step 5: Solve for x
    x = 10,553,820,501.12/86,545.60
  6. Step 6: Final answer
    x = 121,945.20

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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.