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Finding the Fourth Proportional to 115,666.88, 159,660.50 and 79,488.14

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Solution

The fourth proportional to 115,666.88, 159,660.50 and 79,488.14 is: 109,721.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,666.88 : 159,660.50 = 79,488.14 : x
  2. Step 2: Convert to fraction form
    115,666.88/159,660.50 = 79,488.14/x
  3. Step 3: Cross multiply
    115,666.88x = 159,660.50 × 79,488.14
  4. Step 4: Simplify right side
    115,666.88x = 12,691,114,980.73
  5. Step 5: Solve for x
    x = 12,691,114,980.73/115,666.88
  6. Step 6: Final answer
    x = 109,721.26

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1.5x scale

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.