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Finding the Fourth Proportional to 90,633.60, 125,135.28 and 69,374.88

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Solution

The fourth proportional to 90,633.60, 125,135.28 and 69,374.88 is: 95,783.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,633.60 : 125,135.28 = 69,374.88 : x
  2. Step 2: Convert to fraction form
    90,633.60/125,135.28 = 69,374.88/x
  3. Step 3: Cross multiply
    90,633.60x = 125,135.28 × 69,374.88
  4. Step 4: Simplify right side
    90,633.60x = 8,681,245,033.77
  5. Step 5: Solve for x
    x = 8,681,245,033.77/90,633.60
  6. Step 6: Final answer
    x = 95,783.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.