Home / 142,127.04-196,134-78,463.44

Finding the Fourth Proportional to 142,127.04, 196,134 and 78,463.44

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Solution

The fourth proportional to 142,127.04, 196,134 and 78,463.44 is: 108,278.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,127.04 : 196,134 = 78,463.44 : x
  2. Step 2: Convert to fraction form
    142,127.04/196,134 = 78,463.44/x
  3. Step 3: Cross multiply
    142,127.04x = 196,134 × 78,463.44
  4. Step 4: Simplify right side
    142,127.04x = 15,389,348,340.96
  5. Step 5: Solve for x
    x = 15,389,348,340.96/142,127.04
  6. Step 6: Final answer
    x = 108,278.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.