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Finding the Fourth Proportional to 89,885.70, 134,828.55 and 84,345.30

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Solution

The fourth proportional to 89,885.70, 134,828.55 and 84,345.30 is: 126,517.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,885.70 : 134,828.55 = 84,345.30 : x
  2. Step 2: Convert to fraction form
    89,885.70/134,828.55 = 84,345.30/x
  3. Step 3: Cross multiply
    89,885.70x = 134,828.55 × 84,345.30
  4. Step 4: Simplify right side
    89,885.70x = 11,372,154,498.32
  5. Step 5: Solve for x
    x = 11,372,154,498.32/89,885.70
  6. Step 6: Final answer
    x = 126,517.95

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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.