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Finding the Fourth Proportional to 60,335.66, 90,515.64 and 20,891.90

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Solution

The fourth proportional to 60,335.66, 90,515.64 and 20,891.90 is: 31,342.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,335.66 : 90,515.64 = 20,891.90 : x
  2. Step 2: Convert to fraction form
    60,335.66/90,515.64 = 20,891.90/x
  3. Step 3: Cross multiply
    60,335.66x = 90,515.64 × 20,891.90
  4. Step 4: Simplify right side
    60,335.66x = 1,891,043,699.32
  5. Step 5: Solve for x
    x = 1,891,043,699.32/60,335.66
  6. Step 6: Final answer
    x = 31,342.06

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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.