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Finding the Fourth Proportional to 120,773.88, 180,347.54 and 98,631.18

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Solution

The fourth proportional to 120,773.88, 180,347.54 and 98,631.18 is: 147,282.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,773.88 : 180,347.54 = 98,631.18 : x
  2. Step 2: Convert to fraction form
    120,773.88/180,347.54 = 98,631.18/x
  3. Step 3: Cross multiply
    120,773.88x = 180,347.54 × 98,631.18
  4. Step 4: Simplify right side
    120,773.88x = 17,787,890,187.14
  5. Step 5: Solve for x
    x = 17,787,890,187.14/120,773.88
  6. Step 6: Final answer
    x = 147,282.59

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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.