Home / 78,746.30-118,174.79-71,217.55

Finding the Fourth Proportional to 78,746.30, 118,174.79 and 71,217.55

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Solution

The fourth proportional to 78,746.30, 118,174.79 and 71,217.55 is: 106,876.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,746.30 : 118,174.79 = 71,217.55 : x
  2. Step 2: Convert to fraction form
    78,746.30/118,174.79 = 71,217.55/x
  3. Step 3: Cross multiply
    78,746.30x = 118,174.79 × 71,217.55
  4. Step 4: Simplify right side
    78,746.30x = 8,416,118,898.17
  5. Step 5: Solve for x
    x = 8,416,118,898.17/78,746.30
  6. Step 6: Final answer
    x = 106,876.38

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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.