Home / 78,073.12-117,114.48-31,319.92

Finding the Fourth Proportional to 78,073.12, 117,114.48 and 31,319.92

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Solution

The fourth proportional to 78,073.12, 117,114.48 and 31,319.92 is: 46,981.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,073.12 : 117,114.48 = 31,319.92 : x
  2. Step 2: Convert to fraction form
    78,073.12/117,114.48 = 31,319.92/x
  3. Step 3: Cross multiply
    78,073.12x = 117,114.48 × 31,319.92
  4. Step 4: Simplify right side
    78,073.12x = 3,668,016,144.44
  5. Step 5: Solve for x
    x = 3,668,016,144.44/78,073.12
  6. Step 6: Final answer
    x = 46,981.81

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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.