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Finding the Fourth Proportional to 90,866.80, 136,251.60 and 31,704.40

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Solution

The fourth proportional to 90,866.80, 136,251.60 and 31,704.40 is: 47,539.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,866.80 : 136,251.60 = 31,704.40 : x
  2. Step 2: Convert to fraction form
    90,866.80/136,251.60 = 31,704.40/x
  3. Step 3: Cross multiply
    90,866.80x = 136,251.60 × 31,704.40
  4. Step 4: Simplify right side
    90,866.80x = 4,319,775,227.04
  5. Step 5: Solve for x
    x = 4,319,775,227.04/90,866.80
  6. Step 6: Final answer
    x = 47,539.64

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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.