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Finding the Fourth Proportional to 159,348.78, 219,897.04 and 87,729.34

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Solution

The fourth proportional to 159,348.78, 219,897.04 and 87,729.34 is: 121,064.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,348.78 : 219,897.04 = 87,729.34 : x
  2. Step 2: Convert to fraction form
    159,348.78/219,897.04 = 87,729.34/x
  3. Step 3: Cross multiply
    159,348.78x = 219,897.04 × 87,729.34
  4. Step 4: Simplify right side
    159,348.78x = 19,291,422,187.15
  5. Step 5: Solve for x
    x = 19,291,422,187.15/159,348.78
  6. Step 6: Final answer
    x = 121,064.13

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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.