Home / 76,656.57-115,008.36-39,243.15

Finding the Fourth Proportional to 76,656.57, 115,008.36 and 39,243.15

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Solution

The fourth proportional to 76,656.57, 115,008.36 and 39,243.15 is: 58,876.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,656.57 : 115,008.36 = 39,243.15 : x
  2. Step 2: Convert to fraction form
    76,656.57/115,008.36 = 39,243.15/x
  3. Step 3: Cross multiply
    76,656.57x = 115,008.36 × 39,243.15
  4. Step 4: Simplify right side
    76,656.57x = 4,513,290,901.18
  5. Step 5: Solve for x
    x = 4,513,290,901.18/76,656.57
  6. Step 6: Final answer
    x = 58,876.76

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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.