Home / 149,167.12-205,854.42-81,187.78

Finding the Fourth Proportional to 149,167.12, 205,854.42 and 81,187.78

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Solution

The fourth proportional to 149,167.12, 205,854.42 and 81,187.78 is: 112,041.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,167.12 : 205,854.42 = 81,187.78 : x
  2. Step 2: Convert to fraction form
    149,167.12/205,854.42 = 81,187.78/x
  3. Step 3: Cross multiply
    149,167.12x = 205,854.42 × 81,187.78
  4. Step 4: Simplify right side
    149,167.12x = 16,712,863,362.99
  5. Step 5: Solve for x
    x = 16,712,863,362.99/149,167.12
  6. Step 6: Final answer
    x = 112,041.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.