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Finding the Fourth Proportional to 67,001.04, 100,486.21 and 39,991

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Solution

The fourth proportional to 67,001.04, 100,486.21 and 39,991 is: 59,977.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,001.04 : 100,486.21 = 39,991 : x
  2. Step 2: Convert to fraction form
    67,001.04/100,486.21 = 39,991/x
  3. Step 3: Cross multiply
    67,001.04x = 100,486.21 × 39,991
  4. Step 4: Simplify right side
    67,001.04x = 4,018,544,024.11
  5. Step 5: Solve for x
    x = 4,018,544,024.11/67,001.04
  6. Step 6: Final answer
    x = 59,977.34

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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.