Home / 78,118.30-117,177.27-18,953.92

Finding the Fourth Proportional to 78,118.30, 117,177.27 and 18,953.92

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Solution

The fourth proportional to 78,118.30, 117,177.27 and 18,953.92 is: 28,430.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,118.30 : 117,177.27 = 18,953.92 : x
  2. Step 2: Convert to fraction form
    78,118.30/117,177.27 = 18,953.92/x
  3. Step 3: Cross multiply
    78,118.30x = 117,177.27 × 18,953.92
  4. Step 4: Simplify right side
    78,118.30x = 2,220,968,237.38
  5. Step 5: Solve for x
    x = 2,220,968,237.38/78,118.30
  6. Step 6: Final answer
    x = 28,430.83

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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.