Home / 142,117.90-196,126.27-80,860.72

Finding the Fourth Proportional to 142,117.90, 196,126.27 and 80,860.72

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Solution

The fourth proportional to 142,117.90, 196,126.27 and 80,860.72 is: 111,589.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,117.90 : 196,126.27 = 80,860.72 : x
  2. Step 2: Convert to fraction form
    142,117.90/196,126.27 = 80,860.72/x
  3. Step 3: Cross multiply
    142,117.90x = 196,126.27 × 80,860.72
  4. Step 4: Simplify right side
    142,117.90x = 15,858,911,403.11
  5. Step 5: Solve for x
    x = 15,858,911,403.11/142,117.90
  6. Step 6: Final answer
    x = 111,589.82

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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.