Home / 142,023.76-195,993.84-78,363.92

Finding the Fourth Proportional to 142,023.76, 195,993.84 and 78,363.92

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Solution

The fourth proportional to 142,023.76, 195,993.84 and 78,363.92 is: 108,142.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,023.76 : 195,993.84 = 78,363.92 : x
  2. Step 2: Convert to fraction form
    142,023.76/195,993.84 = 78,363.92/x
  3. Step 3: Cross multiply
    142,023.76x = 195,993.84 × 78,363.92
  4. Step 4: Simplify right side
    142,023.76x = 15,358,845,598.25
  5. Step 5: Solve for x
    x = 15,358,845,598.25/142,023.76
  6. Step 6: Final answer
    x = 108,142.79

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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.