Home / 142,214.40-196,257.60-78,559.20

Finding the Fourth Proportional to 142,214.40, 196,257.60 and 78,559.20

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Solution

The fourth proportional to 142,214.40, 196,257.60 and 78,559.20 is: 108,412.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,214.40 : 196,257.60 = 78,559.20 : x
  2. Step 2: Convert to fraction form
    142,214.40/196,257.60 = 78,559.20/x
  3. Step 3: Cross multiply
    142,214.40x = 196,257.60 × 78,559.20
  4. Step 4: Simplify right side
    142,214.40x = 15,417,840,049.92
  5. Step 5: Solve for x
    x = 15,417,840,049.92/142,214.40
  6. Step 6: Final answer
    x = 108,412.65

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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.