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Finding the Fourth Proportional to 89,892.40, 134,887.20 and 39,980.20

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Solution

The fourth proportional to 89,892.40, 134,887.20 and 39,980.20 is: 59,991.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,892.40 : 134,887.20 = 39,980.20 : x
  2. Step 2: Convert to fraction form
    89,892.40/134,887.20 = 39,980.20/x
  3. Step 3: Cross multiply
    89,892.40x = 134,887.20 × 39,980.20
  4. Step 4: Simplify right side
    89,892.40x = 5,392,817,233.44
  5. Step 5: Solve for x
    x = 5,392,817,233.44/89,892.40
  6. Step 6: Final answer
    x = 59,991.92

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1.5x scale

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.