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Finding the Fourth Proportional to 98,318.61, 135,691.20 and 55,883.52

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Solution

The fourth proportional to 98,318.61, 135,691.20 and 55,883.52 is: 77,125.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,318.61 : 135,691.20 = 55,883.52 : x
  2. Step 2: Convert to fraction form
    98,318.61/135,691.20 = 55,883.52/x
  3. Step 3: Cross multiply
    98,318.61x = 135,691.20 × 55,883.52
  4. Step 4: Simplify right side
    98,318.61x = 7,582,901,889.02
  5. Step 5: Solve for x
    x = 7,582,901,889.02/98,318.61
  6. Step 6: Final answer
    x = 77,125.80

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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.