Home / 142,126.38-196,132.05-78,462.54

Finding the Fourth Proportional to 142,126.38, 196,132.05 and 78,462.54

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Solution

The fourth proportional to 142,126.38, 196,132.05 and 78,462.54 is: 108,277.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,126.38 : 196,132.05 = 78,462.54 : x
  2. Step 2: Convert to fraction form
    142,126.38/196,132.05 = 78,462.54/x
  3. Step 3: Cross multiply
    142,126.38x = 196,132.05 × 78,462.54
  4. Step 4: Simplify right side
    142,126.38x = 15,389,018,818.41
  5. Step 5: Solve for x
    x = 15,389,018,818.41/142,126.38
  6. Step 6: Final answer
    x = 108,277.01

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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.