Home / 78,968.76-118,453.65-31,587.81

Finding the Fourth Proportional to 78,968.76, 118,453.65 and 31,587.81

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Solution

The fourth proportional to 78,968.76, 118,453.65 and 31,587.81 is: 47,381.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,968.76 : 118,453.65 = 31,587.81 : x
  2. Step 2: Convert to fraction form
    78,968.76/118,453.65 = 31,587.81/x
  3. Step 3: Cross multiply
    78,968.76x = 118,453.65 × 31,587.81
  4. Step 4: Simplify right side
    78,968.76x = 3,741,691,390.01
  5. Step 5: Solve for x
    x = 3,741,691,390.01/78,968.76
  6. Step 6: Final answer
    x = 47,381.92

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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.