Home / 142,331.40-196,407.36-78,671.52

Finding the Fourth Proportional to 142,331.40, 196,407.36 and 78,671.52

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Solution

The fourth proportional to 142,331.40, 196,407.36 and 78,671.52 is: 108,561.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,331.40 : 196,407.36 = 78,671.52 : x
  2. Step 2: Convert to fraction form
    142,331.40/196,407.36 = 78,671.52/x
  3. Step 3: Cross multiply
    142,331.40x = 196,407.36 × 78,671.52
  4. Step 4: Simplify right side
    142,331.40x = 15,451,665,550.39
  5. Step 5: Solve for x
    x = 15,451,665,550.39/142,331.40
  6. Step 6: Final answer
    x = 108,561.19

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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.