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Finding the Fourth Proportional to 98,560.80, 147,841.20 and 78,877.80

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Solution

The fourth proportional to 98,560.80, 147,841.20 and 78,877.80 is: 118,316.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,560.80 : 147,841.20 = 78,877.80 : x
  2. Step 2: Convert to fraction form
    98,560.80/147,841.20 = 78,877.80/x
  3. Step 3: Cross multiply
    98,560.80x = 147,841.20 × 78,877.80
  4. Step 4: Simplify right side
    98,560.80x = 11,661,388,605.36
  5. Step 5: Solve for x
    x = 11,661,388,605.36/98,560.80
  6. Step 6: Final answer
    x = 118,316.70

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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.