Home / 142,122.72-196,126.19-77,589.48

Finding the Fourth Proportional to 142,122.72, 196,126.19 and 77,589.48

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Solution

The fourth proportional to 142,122.72, 196,126.19 and 77,589.48 is: 107,071.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,122.72 : 196,126.19 = 77,589.48 : x
  2. Step 2: Convert to fraction form
    142,122.72/196,126.19 = 77,589.48/x
  3. Step 3: Cross multiply
    142,122.72x = 196,126.19 × 77,589.48
  4. Step 4: Simplify right side
    142,122.72x = 15,217,328,708.53
  5. Step 5: Solve for x
    x = 15,217,328,708.53/142,122.72
  6. Step 6: Final answer
    x = 107,071.75

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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.