Home / 135,543.90-186,945.08-81,772.86

Finding the Fourth Proportional to 135,543.90, 186,945.08 and 81,772.86

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Solution

The fourth proportional to 135,543.90, 186,945.08 and 81,772.86 is: 112,782.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,543.90 : 186,945.08 = 81,772.86 : x
  2. Step 2: Convert to fraction form
    135,543.90/186,945.08 = 81,772.86/x
  3. Step 3: Cross multiply
    135,543.90x = 186,945.08 × 81,772.86
  4. Step 4: Simplify right side
    135,543.90x = 15,287,033,854.53
  5. Step 5: Solve for x
    x = 15,287,033,854.53/135,543.90
  6. Step 6: Final answer
    x = 112,782.90

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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.