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Finding the Fourth Proportional to 60,491.36, 90,731.28 and 21,046.88

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Solution

The fourth proportional to 60,491.36, 90,731.28 and 21,046.88 is: 31,568.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,491.36 : 90,731.28 = 21,046.88 : x
  2. Step 2: Convert to fraction form
    60,491.36/90,731.28 = 21,046.88/x
  3. Step 3: Cross multiply
    60,491.36x = 90,731.28 × 21,046.88
  4. Step 4: Simplify right side
    60,491.36x = 1,909,610,362.41
  5. Step 5: Solve for x
    x = 1,909,610,362.41/60,491.36
  6. Step 6: Final answer
    x = 31,568.32

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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.