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Finding the Fourth Proportional to 159,514.78, 220,140.20 and 87,894.78

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Solution

The fourth proportional to 159,514.78, 220,140.20 and 87,894.78 is: 121,300.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,514.78 : 220,140.20 = 87,894.78 : x
  2. Step 2: Convert to fraction form
    159,514.78/220,140.20 = 87,894.78/x
  3. Step 3: Cross multiply
    159,514.78x = 220,140.20 × 87,894.78
  4. Step 4: Simplify right side
    159,514.78x = 19,349,173,458.33
  5. Step 5: Solve for x
    x = 19,349,173,458.33/159,514.78
  6. Step 6: Final answer
    x = 121,300.20

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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.