Home / 121,406.90-182,499.15-86,587.70

Finding the Fourth Proportional to 121,406.90, 182,499.15 and 86,587.70

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Solution

The fourth proportional to 121,406.90, 182,499.15 and 86,587.70 is: 130,158.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,406.90 : 182,499.15 = 86,587.70 : x
  2. Step 2: Convert to fraction form
    121,406.90/182,499.15 = 86,587.70/x
  3. Step 3: Cross multiply
    121,406.90x = 182,499.15 × 86,587.70
  4. Step 4: Simplify right side
    121,406.90x = 15,802,181,650.46
  5. Step 5: Solve for x
    x = 15,802,181,650.46/121,406.90
  6. Step 6: Final answer
    x = 130,158.84

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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.