Home / 78,145.66-117,223.76-38,692.18

Finding the Fourth Proportional to 78,145.66, 117,223.76 and 38,692.18

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Solution

The fourth proportional to 78,145.66, 117,223.76 and 38,692.18 is: 58,040.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,145.66 : 117,223.76 = 38,692.18 : x
  2. Step 2: Convert to fraction form
    78,145.66/117,223.76 = 38,692.18/x
  3. Step 3: Cross multiply
    78,145.66x = 117,223.76 × 38,692.18
  4. Step 4: Simplify right side
    78,145.66x = 4,535,642,822.20
  5. Step 5: Solve for x
    x = 4,535,642,822.20/78,145.66
  6. Step 6: Final answer
    x = 58,040.88

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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.