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Finding the Fourth Proportional to 99,805.60, 149,708.40 and 89,964.10

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Solution

The fourth proportional to 99,805.60, 149,708.40 and 89,964.10 is: 134,946.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,805.60 : 149,708.40 = 89,964.10 : x
  2. Step 2: Convert to fraction form
    99,805.60/149,708.40 = 89,964.10/x
  3. Step 3: Cross multiply
    99,805.60x = 149,708.40 × 89,964.10
  4. Step 4: Simplify right side
    99,805.60x = 13,468,381,468.44
  5. Step 5: Solve for x
    x = 13,468,381,468.44/99,805.60
  6. Step 6: Final answer
    x = 134,946.15

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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.