Home / 78,764.15-118,098.50-31,386.44

Finding the Fourth Proportional to 78,764.15, 118,098.50 and 31,386.44

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Solution

The fourth proportional to 78,764.15, 118,098.50 and 31,386.44 is: 47,060.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,764.15 : 118,098.50 = 31,386.44 : x
  2. Step 2: Convert to fraction form
    78,764.15/118,098.50 = 31,386.44/x
  3. Step 3: Cross multiply
    78,764.15x = 118,098.50 × 31,386.44
  4. Step 4: Simplify right side
    78,764.15x = 3,706,690,736.92
  5. Step 5: Solve for x
    x = 3,706,690,736.92/78,764.15
  6. Step 6: Final answer
    x = 47,060.64

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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.