Home / 142,370.20-196,472.10-78,710.68

Finding the Fourth Proportional to 142,370.20, 196,472.10 and 78,710.68

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Solution

The fourth proportional to 142,370.20, 196,472.10 and 78,710.68 is: 108,621.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,370.20 : 196,472.10 = 78,710.68 : x
  2. Step 2: Convert to fraction form
    142,370.20/196,472.10 = 78,710.68/x
  3. Step 3: Cross multiply
    142,370.20x = 196,472.10 × 78,710.68
  4. Step 4: Simplify right side
    142,370.20x = 15,464,452,592.03
  5. Step 5: Solve for x
    x = 15,464,452,592.03/142,370.20
  6. Step 6: Final answer
    x = 108,621.42

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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.