Home / 121,439.10-182,158.65-86,009.70

Finding the Fourth Proportional to 121,439.10, 182,158.65 and 86,009.70

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Solution

The fourth proportional to 121,439.10, 182,158.65 and 86,009.70 is: 129,014.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,439.10 : 182,158.65 = 86,009.70 : x
  2. Step 2: Convert to fraction form
    121,439.10/182,158.65 = 86,009.70/x
  3. Step 3: Cross multiply
    121,439.10x = 182,158.65 × 86,009.70
  4. Step 4: Simplify right side
    121,439.10x = 15,667,410,838.91
  5. Step 5: Solve for x
    x = 15,667,410,838.91/121,439.10
  6. Step 6: Final answer
    x = 129,014.55

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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.