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Finding the Fourth Proportional to 67,391.54, 101,070 and 19,995.42

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Solution

The fourth proportional to 67,391.54, 101,070 and 19,995.42 is: 29,987.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,391.54 : 101,070 = 19,995.42 : x
  2. Step 2: Convert to fraction form
    67,391.54/101,070 = 19,995.42/x
  3. Step 3: Cross multiply
    67,391.54x = 101,070 × 19,995.42
  4. Step 4: Simplify right side
    67,391.54x = 2,020,937,099.40
  5. Step 5: Solve for x
    x = 2,020,937,099.40/67,391.54
  6. Step 6: Final answer
    x = 29,987.99

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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.