Home / 131,261.50-181,140.87-71,645.50

Finding the Fourth Proportional to 131,261.50, 181,140.87 and 71,645.50

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Solution

The fourth proportional to 131,261.50, 181,140.87 and 71,645.50 is: 98,870.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,261.50 : 181,140.87 = 71,645.50 : x
  2. Step 2: Convert to fraction form
    131,261.50/181,140.87 = 71,645.50/x
  3. Step 3: Cross multiply
    131,261.50x = 181,140.87 × 71,645.50
  4. Step 4: Simplify right side
    131,261.50x = 12,977,928,201.59
  5. Step 5: Solve for x
    x = 12,977,928,201.59/131,261.50
  6. Step 6: Final answer
    x = 98,870.79

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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.