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Finding the Fourth Proportional to 90,514.49, 124,934.21 and 56,502.48

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Solution

The fourth proportional to 90,514.49, 124,934.21 and 56,502.48 is: 77,988.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,514.49 : 124,934.21 = 56,502.48 : x
  2. Step 2: Convert to fraction form
    90,514.49/124,934.21 = 56,502.48/x
  3. Step 3: Cross multiply
    90,514.49x = 124,934.21 × 56,502.48
  4. Step 4: Simplify right side
    90,514.49x = 7,059,092,419.33
  5. Step 5: Solve for x
    x = 7,059,092,419.33/90,514.49
  6. Step 6: Final answer
    x = 77,988.54

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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.