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Finding the Fourth Proportional to 90,649.82, 124,995.90 and 61,974.15

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Solution

The fourth proportional to 90,649.82, 124,995.90 and 61,974.15 is: 85,455.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,649.82 : 124,995.90 = 61,974.15 : x
  2. Step 2: Convert to fraction form
    90,649.82/124,995.90 = 61,974.15/x
  3. Step 3: Cross multiply
    90,649.82x = 124,995.90 × 61,974.15
  4. Step 4: Simplify right side
    90,649.82x = 7,746,514,655.99
  5. Step 5: Solve for x
    x = 7,746,514,655.99/90,649.82
  6. Step 6: Final answer
    x = 85,455.38

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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.