Home / 90,697.88-136,243.64-76,686.04

Finding the Fourth Proportional to 90,697.88, 136,243.64 and 76,686.04

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Solution

The fourth proportional to 90,697.88, 136,243.64 and 76,686.04 is: 115,195.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,697.88 : 136,243.64 = 76,686.04 : x
  2. Step 2: Convert to fraction form
    90,697.88/136,243.64 = 76,686.04/x
  3. Step 3: Cross multiply
    90,697.88x = 136,243.64 × 76,686.04
  4. Step 4: Simplify right side
    90,697.88x = 10,447,984,886.18
  5. Step 5: Solve for x
    x = 10,447,984,886.18/90,697.88
  6. Step 6: Final answer
    x = 115,195.48

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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.