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Finding the Fourth Proportional to 90,663.36, 135,990.88 and 31,503.66

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Solution

The fourth proportional to 90,663.36, 135,990.88 and 31,503.66 is: 47,254.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,663.36 : 135,990.88 = 31,503.66 : x
  2. Step 2: Convert to fraction form
    90,663.36/135,990.88 = 31,503.66/x
  3. Step 3: Cross multiply
    90,663.36x = 135,990.88 × 31,503.66
  4. Step 4: Simplify right side
    90,663.36x = 4,284,210,446.62
  5. Step 5: Solve for x
    x = 4,284,210,446.62/90,663.36
  6. Step 6: Final answer
    x = 47,254.04

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Similar ratio
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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.