Home / 78,348.90-108,121.14-42,538.62

Finding the Fourth Proportional to 78,348.90, 108,121.14 and 42,538.62

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Solution

The fourth proportional to 78,348.90, 108,121.14 and 42,538.62 is: 58,703.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,348.90 : 108,121.14 = 42,538.62 : x
  2. Step 2: Convert to fraction form
    78,348.90/108,121.14 = 42,538.62/x
  3. Step 3: Cross multiply
    78,348.90x = 108,121.14 × 42,538.62
  4. Step 4: Simplify right side
    78,348.90x = 4,599,324,088.43
  5. Step 5: Solve for x
    x = 4,599,324,088.43/78,348.90
  6. Step 6: Final answer
    x = 58,703.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.