Home / 142,127.14-196,131.70-78,463.57

Finding the Fourth Proportional to 142,127.14, 196,131.70 and 78,463.57

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Solution

The fourth proportional to 142,127.14, 196,131.70 and 78,463.57 is: 108,277.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,127.14 : 196,131.70 = 78,463.57 : x
  2. Step 2: Convert to fraction form
    142,127.14/196,131.70 = 78,463.57/x
  3. Step 3: Cross multiply
    142,127.14x = 196,131.70 × 78,463.57
  4. Step 4: Simplify right side
    142,127.14x = 15,389,193,372.17
  5. Step 5: Solve for x
    x = 15,389,193,372.17/142,127.14
  6. Step 6: Final answer
    x = 108,277.65

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1.5x scale

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.