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Finding the Fourth Proportional to 120,805.88, 180,395.29 and 98,663.20

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Solution

The fourth proportional to 120,805.88, 180,395.29 and 98,663.20 is: 147,330.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,805.88 : 180,395.29 = 98,663.20 : x
  2. Step 2: Convert to fraction form
    120,805.88/180,395.29 = 98,663.20/x
  3. Step 3: Cross multiply
    120,805.88x = 180,395.29 × 98,663.20
  4. Step 4: Simplify right side
    120,805.88x = 17,798,376,576.33
  5. Step 5: Solve for x
    x = 17,798,376,576.33/120,805.88
  6. Step 6: Final answer
    x = 147,330.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.