Home / 121,438.10-182,157.15-86,008.70

Finding the Fourth Proportional to 121,438.10, 182,157.15 and 86,008.70

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Solution

The fourth proportional to 121,438.10, 182,157.15 and 86,008.70 is: 129,013.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,438.10 : 182,157.15 = 86,008.70 : x
  2. Step 2: Convert to fraction form
    121,438.10/182,157.15 = 86,008.70/x
  3. Step 3: Cross multiply
    121,438.10x = 182,157.15 × 86,008.70
  4. Step 4: Simplify right side
    121,438.10x = 15,667,099,667.21
  5. Step 5: Solve for x
    x = 15,667,099,667.21/121,438.10
  6. Step 6: Final answer
    x = 129,013.05

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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.