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Finding the Fourth Proportional to 60,491.80, 90,716.10 and 21,050.20

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Solution

The fourth proportional to 60,491.80, 90,716.10 and 21,050.20 is: 31,567.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,491.80 : 90,716.10 = 21,050.20 : x
  2. Step 2: Convert to fraction form
    60,491.80/90,716.10 = 21,050.20/x
  3. Step 3: Cross multiply
    60,491.80x = 90,716.10 × 21,050.20
  4. Step 4: Simplify right side
    60,491.80x = 1,909,592,048.22
  5. Step 5: Solve for x
    x = 1,909,592,048.22/60,491.80
  6. Step 6: Final answer
    x = 31,567.78

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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.