Home / 121,182.60-181,385.10-86,190.60

Finding the Fourth Proportional to 121,182.60, 181,385.10 and 86,190.60

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Solution

The fourth proportional to 121,182.60, 181,385.10 and 86,190.60 is: 129,009.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,182.60 : 181,385.10 = 86,190.60 : x
  2. Step 2: Convert to fraction form
    121,182.60/181,385.10 = 86,190.60/x
  3. Step 3: Cross multiply
    121,182.60x = 181,385.10 × 86,190.60
  4. Step 4: Simplify right side
    121,182.60x = 15,633,690,600.06
  5. Step 5: Solve for x
    x = 15,633,690,600.06/121,182.60
  6. Step 6: Final answer
    x = 129,009.37

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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.