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Finding the Fourth Proportional to 89,616.80, 134,129.92 and 79,775.30

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Solution

The fourth proportional to 89,616.80, 134,129.92 and 79,775.30 is: 119,400.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,616.80 : 134,129.92 = 79,775.30 : x
  2. Step 2: Convert to fraction form
    89,616.80/134,129.92 = 79,775.30/x
  3. Step 3: Cross multiply
    89,616.80x = 134,129.92 × 79,775.30
  4. Step 4: Simplify right side
    89,616.80x = 10,700,254,606.98
  5. Step 5: Solve for x
    x = 10,700,254,606.98/89,616.80
  6. Step 6: Final answer
    x = 119,400.10

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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.