Home / 76,911.13-115,386.20-21,507.13

Finding the Fourth Proportional to 76,911.13, 115,386.20 and 21,507.13

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Solution

The fourth proportional to 76,911.13, 115,386.20 and 21,507.13 is: 32,266.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,911.13 : 115,386.20 = 21,507.13 : x
  2. Step 2: Convert to fraction form
    76,911.13/115,386.20 = 21,507.13/x
  3. Step 3: Cross multiply
    76,911.13x = 115,386.20 × 21,507.13
  4. Step 4: Simplify right side
    76,911.13x = 2,481,626,003.61
  5. Step 5: Solve for x
    x = 2,481,626,003.61/76,911.13
  6. Step 6: Final answer
    x = 32,266.15

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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.