Home / 78,780.15-118,071.68-39,348.27

Finding the Fourth Proportional to 78,780.15, 118,071.68 and 39,348.27

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Solution

The fourth proportional to 78,780.15, 118,071.68 and 39,348.27 is: 58,973.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,780.15 : 118,071.68 = 39,348.27 : x
  2. Step 2: Convert to fraction form
    78,780.15/118,071.68 = 39,348.27/x
  3. Step 3: Cross multiply
    78,780.15x = 118,071.68 × 39,348.27
  4. Step 4: Simplify right side
    78,780.15x = 4,645,916,147.25
  5. Step 5: Solve for x
    x = 4,645,916,147.25/78,780.15
  6. Step 6: Final answer
    x = 58,973.18

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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.