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Finding the Fourth Proportional to 98,387.76, 135,775.12 and 55,948.90

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Solution

The fourth proportional to 98,387.76, 135,775.12 and 55,948.90 is: 77,209.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,387.76 : 135,775.12 = 55,948.90 : x
  2. Step 2: Convert to fraction form
    98,387.76/135,775.12 = 55,948.90/x
  3. Step 3: Cross multiply
    98,387.76x = 135,775.12 × 55,948.90
  4. Step 4: Simplify right side
    98,387.76x = 7,596,468,611.37
  5. Step 5: Solve for x
    x = 7,596,468,611.37/98,387.76
  6. Step 6: Final answer
    x = 77,209.49

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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.