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Finding the Fourth Proportional to 90,884.40, 136,472.40 and 61,432.80

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Solution

The fourth proportional to 90,884.40, 136,472.40 and 61,432.80 is: 92,247.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,884.40 : 136,472.40 = 61,432.80 : x
  2. Step 2: Convert to fraction form
    90,884.40/136,472.40 = 61,432.80/x
  3. Step 3: Cross multiply
    90,884.40x = 136,472.40 × 61,432.80
  4. Step 4: Simplify right side
    90,884.40x = 8,383,881,654.72
  5. Step 5: Solve for x
    x = 8,383,881,654.72/90,884.40
  6. Step 6: Final answer
    x = 92,247.75

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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.