Home / 80,752.90-121,201.35-47,431.30

Finding the Fourth Proportional to 80,752.90, 121,201.35 and 47,431.30

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Solution

The fourth proportional to 80,752.90, 121,201.35 and 47,431.30 is: 71,189.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,752.90 : 121,201.35 = 47,431.30 : x
  2. Step 2: Convert to fraction form
    80,752.90/121,201.35 = 47,431.30/x
  3. Step 3: Cross multiply
    80,752.90x = 121,201.35 × 47,431.30
  4. Step 4: Simplify right side
    80,752.90x = 5,748,737,592.26
  5. Step 5: Solve for x
    x = 5,748,737,592.26/80,752.90
  6. Step 6: Final answer
    x = 71,189.24

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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.