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Finding the Fourth Proportional to 107,689.20, 148,609.80 and 62,977.20

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Solution

The fourth proportional to 107,689.20, 148,609.80 and 62,977.20 is: 86,907.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,689.20 : 148,609.80 = 62,977.20 : x
  2. Step 2: Convert to fraction form
    107,689.20/148,609.80 = 62,977.20/x
  3. Step 3: Cross multiply
    107,689.20x = 148,609.80 × 62,977.20
  4. Step 4: Simplify right side
    107,689.20x = 9,359,029,096.56
  5. Step 5: Solve for x
    x = 9,359,029,096.56/107,689.20
  6. Step 6: Final answer
    x = 86,907.78

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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.