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Finding the Fourth Proportional to 87,120.88, 120,246.44 and 53,140.88

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Solution

The fourth proportional to 87,120.88, 120,246.44 and 53,140.88 is: 73,346.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,120.88 : 120,246.44 = 53,140.88 : x
  2. Step 2: Convert to fraction form
    87,120.88/120,246.44 = 53,140.88/x
  3. Step 3: Cross multiply
    87,120.88x = 120,246.44 × 53,140.88
  4. Step 4: Simplify right side
    87,120.88x = 6,390,001,638.47
  5. Step 5: Solve for x
    x = 6,390,001,638.47/87,120.88
  6. Step 6: Final answer
    x = 73,346.39

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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.