Home / 142,077.20-213,078.80-42,213.92

Finding the Fourth Proportional to 142,077.20, 213,078.80 and 42,213.92

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Solution

The fourth proportional to 142,077.20, 213,078.80 and 42,213.92 is: 63,309.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,077.20 : 213,078.80 = 42,213.92 : x
  2. Step 2: Convert to fraction form
    142,077.20/213,078.80 = 42,213.92/x
  3. Step 3: Cross multiply
    142,077.20x = 213,078.80 × 42,213.92
  4. Step 4: Simplify right side
    142,077.20x = 8,994,891,416.90
  5. Step 5: Solve for x
    x = 8,994,891,416.90/142,077.20
  6. Step 6: Final answer
    x = 63,309.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.