Home / 78,242.17-117,333.79-28,309.92

Finding the Fourth Proportional to 78,242.17, 117,333.79 and 28,309.92

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Solution

The fourth proportional to 78,242.17, 117,333.79 and 28,309.92 is: 42,454.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,242.17 : 117,333.79 = 28,309.92 : x
  2. Step 2: Convert to fraction form
    78,242.17/117,333.79 = 28,309.92/x
  3. Step 3: Cross multiply
    78,242.17x = 117,333.79 × 28,309.92
  4. Step 4: Simplify right side
    78,242.17x = 3,321,710,066.65
  5. Step 5: Solve for x
    x = 3,321,710,066.65/78,242.17
  6. Step 6: Final answer
    x = 42,454.22

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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.