Home / 78,818.34-118,167.36-39,403.20

Finding the Fourth Proportional to 78,818.34, 118,167.36 and 39,403.20

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Solution

The fourth proportional to 78,818.34, 118,167.36 and 39,403.20 is: 59,074.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,818.34 : 118,167.36 = 39,403.20 : x
  2. Step 2: Convert to fraction form
    78,818.34/118,167.36 = 39,403.20/x
  3. Step 3: Cross multiply
    78,818.34x = 118,167.36 × 39,403.20
  4. Step 4: Simplify right side
    78,818.34x = 4,656,172,119.55
  5. Step 5: Solve for x
    x = 4,656,172,119.55/78,818.34
  6. Step 6: Final answer
    x = 59,074.73

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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.