Home / 80,805.02-121,042.28-65,865.38

Finding the Fourth Proportional to 80,805.02, 121,042.28 and 65,865.38

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Solution

The fourth proportional to 80,805.02, 121,042.28 and 65,865.38 is: 98,663.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,805.02 : 121,042.28 = 65,865.38 : x
  2. Step 2: Convert to fraction form
    80,805.02/121,042.28 = 65,865.38/x
  3. Step 3: Cross multiply
    80,805.02x = 121,042.28 × 65,865.38
  4. Step 4: Simplify right side
    80,805.02x = 7,972,495,163.06
  5. Step 5: Solve for x
    x = 7,972,495,163.06/80,805.02
  6. Step 6: Final answer
    x = 98,663.37

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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.