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Finding the Fourth Proportional to 90,824, 125,337.66 and 51,080

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Solution

The fourth proportional to 90,824, 125,337.66 and 51,080 is: 70,490.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,824 : 125,337.66 = 51,080 : x
  2. Step 2: Convert to fraction form
    90,824/125,337.66 = 51,080/x
  3. Step 3: Cross multiply
    90,824x = 125,337.66 × 51,080
  4. Step 4: Simplify right side
    90,824x = 6,402,247,672.80
  5. Step 5: Solve for x
    x = 6,402,247,672.80/90,824
  6. Step 6: Final answer
    x = 70,490.70

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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.