Home / 147,634.20-220,868.10-128,129.40

Finding the Fourth Proportional to 147,634.20, 220,868.10 and 128,129.40

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Solution

The fourth proportional to 147,634.20, 220,868.10 and 128,129.40 is: 191,687.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,634.20 : 220,868.10 = 128,129.40 : x
  2. Step 2: Convert to fraction form
    147,634.20/220,868.10 = 128,129.40/x
  3. Step 3: Cross multiply
    147,634.20x = 220,868.10 × 128,129.40
  4. Step 4: Simplify right side
    147,634.20x = 28,299,697,132.14
  5. Step 5: Solve for x
    x = 28,299,697,132.14/147,634.20
  6. Step 6: Final answer
    x = 191,687.95

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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.