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Finding the Fourth Proportional to 60,508.80, 90,741.60 and 21,067.20

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Solution

The fourth proportional to 60,508.80, 90,741.60 and 21,067.20 is: 31,593.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,508.80 : 90,741.60 = 21,067.20 : x
  2. Step 2: Convert to fraction form
    60,508.80/90,741.60 = 21,067.20/x
  3. Step 3: Cross multiply
    60,508.80x = 90,741.60 × 21,067.20
  4. Step 4: Simplify right side
    60,508.80x = 1,911,671,435.52
  5. Step 5: Solve for x
    x = 1,911,671,435.52/60,508.80
  6. Step 6: Final answer
    x = 31,593.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.