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Finding the Fourth Proportional to 90,057.88, 124,275.90 and 51,815.80

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Solution

The fourth proportional to 90,057.88, 124,275.90 and 51,815.80 is: 71,503.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,057.88 : 124,275.90 = 51,815.80 : x
  2. Step 2: Convert to fraction form
    90,057.88/124,275.90 = 51,815.80/x
  3. Step 3: Cross multiply
    90,057.88x = 124,275.90 × 51,815.80
  4. Step 4: Simplify right side
    90,057.88x = 6,439,455,179.22
  5. Step 5: Solve for x
    x = 6,439,455,179.22/90,057.88
  6. Step 6: Final answer
    x = 71,503.52

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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.