Home / 142,370.12-196,480.68-78,713.84

Finding the Fourth Proportional to 142,370.12, 196,480.68 and 78,713.84

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Solution

The fourth proportional to 142,370.12, 196,480.68 and 78,713.84 is: 108,630.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,370.12 : 196,480.68 = 78,713.84 : x
  2. Step 2: Convert to fraction form
    142,370.12/196,480.68 = 78,713.84/x
  3. Step 3: Cross multiply
    142,370.12x = 196,480.68 × 78,713.84
  4. Step 4: Simplify right side
    142,370.12x = 15,465,748,808.61
  5. Step 5: Solve for x
    x = 15,465,748,808.61/142,370.12
  6. Step 6: Final answer
    x = 108,630.58

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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.