Home / 90,660.88-125,011.12-61,985.20

Finding the Fourth Proportional to 90,660.88, 125,011.12 and 61,985.20

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Solution

The fourth proportional to 90,660.88, 125,011.12 and 61,985.20 is: 85,470.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,660.88 : 125,011.12 = 61,985.20 : x
  2. Step 2: Convert to fraction form
    90,660.88/125,011.12 = 61,985.20/x
  3. Step 3: Cross multiply
    90,660.88x = 125,011.12 × 61,985.20
  4. Step 4: Simplify right side
    90,660.88x = 7,748,839,275.42
  5. Step 5: Solve for x
    x = 7,748,839,275.42/90,660.88
  6. Step 6: Final answer
    x = 85,470.59

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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.