Home / 78,431.22-118,073.58-71,456.04

Finding the Fourth Proportional to 78,431.22, 118,073.58 and 71,456.04

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Solution

The fourth proportional to 78,431.22, 118,073.58 and 71,456.04 is: 107,572.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,431.22 : 118,073.58 = 71,456.04 : x
  2. Step 2: Convert to fraction form
    78,431.22/118,073.58 = 71,456.04/x
  3. Step 3: Cross multiply
    78,431.22x = 118,073.58 × 71,456.04
  4. Step 4: Simplify right side
    78,431.22x = 8,437,070,455.42
  5. Step 5: Solve for x
    x = 8,437,070,455.42/78,431.22
  6. Step 6: Final answer
    x = 107,572.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.