Home / 121,011.60-181,474.20-42,128.40

Finding the Fourth Proportional to 121,011.60, 181,474.20 and 42,128.40

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Solution

The fourth proportional to 121,011.60, 181,474.20 and 42,128.40 is: 63,177.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,011.60 : 181,474.20 = 42,128.40 : x
  2. Step 2: Convert to fraction form
    121,011.60/181,474.20 = 42,128.40/x
  3. Step 3: Cross multiply
    121,011.60x = 181,474.20 × 42,128.40
  4. Step 4: Simplify right side
    121,011.60x = 7,645,217,687.28
  5. Step 5: Solve for x
    x = 7,645,217,687.28/121,011.60
  6. Step 6: Final answer
    x = 63,177.56

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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.