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Finding the Fourth Proportional to 80,775.40, 121,187.40 and 43,353.40

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Solution

The fourth proportional to 80,775.40, 121,187.40 and 43,353.40 is: 65,043.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,775.40 : 121,187.40 = 43,353.40 : x
  2. Step 2: Convert to fraction form
    80,775.40/121,187.40 = 43,353.40/x
  3. Step 3: Cross multiply
    80,775.40x = 121,187.40 × 43,353.40
  4. Step 4: Simplify right side
    80,775.40x = 5,253,885,827.16
  5. Step 5: Solve for x
    x = 5,253,885,827.16/80,775.40
  6. Step 6: Final answer
    x = 65,043.14

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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.