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Finding the Fourth Proportional to 89,692.08, 134,330.76 and 86,581.68

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Solution

The fourth proportional to 89,692.08, 134,330.76 and 86,581.68 is: 129,672.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,692.08 : 134,330.76 = 86,581.68 : x
  2. Step 2: Convert to fraction form
    89,692.08/134,330.76 = 86,581.68/x
  3. Step 3: Cross multiply
    89,692.08x = 134,330.76 × 86,581.68
  4. Step 4: Simplify right side
    89,692.08x = 11,630,582,876.48
  5. Step 5: Solve for x
    x = 11,630,582,876.48/89,692.08
  6. Step 6: Final answer
    x = 129,672.35

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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.