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Finding the Fourth Proportional to 90,407.52, 135,609.48 and 28,077.84

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Solution

The fourth proportional to 90,407.52, 135,609.48 and 28,077.84 is: 42,116.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,407.52 : 135,609.48 = 28,077.84 : x
  2. Step 2: Convert to fraction form
    90,407.52/135,609.48 = 28,077.84/x
  3. Step 3: Cross multiply
    90,407.52x = 135,609.48 × 28,077.84
  4. Step 4: Simplify right side
    90,407.52x = 3,807,621,281.92
  5. Step 5: Solve for x
    x = 3,807,621,281.92/90,407.52
  6. Step 6: Final answer
    x = 42,116.20

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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.