Home / 78,142.14-117,276.03-40,713.39

Finding the Fourth Proportional to 78,142.14, 117,276.03 and 40,713.39

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Solution

The fourth proportional to 78,142.14, 117,276.03 and 40,713.39 is: 61,102.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,142.14 : 117,276.03 = 40,713.39 : x
  2. Step 2: Convert to fraction form
    78,142.14/117,276.03 = 40,713.39/x
  3. Step 3: Cross multiply
    78,142.14x = 117,276.03 × 40,713.39
  4. Step 4: Simplify right side
    78,142.14x = 4,774,704,747.04
  5. Step 5: Solve for x
    x = 4,774,704,747.04/78,142.14
  6. Step 6: Final answer
    x = 61,102.82

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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.