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Finding the Fourth Proportional to 67,389.40, 101,019.30 and 52,388.20

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Solution

The fourth proportional to 67,389.40, 101,019.30 and 52,388.20 is: 78,531.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,389.40 : 101,019.30 = 52,388.20 : x
  2. Step 2: Convert to fraction form
    67,389.40/101,019.30 = 52,388.20/x
  3. Step 3: Cross multiply
    67,389.40x = 101,019.30 × 52,388.20
  4. Step 4: Simplify right side
    67,389.40x = 5,292,219,292.26
  5. Step 5: Solve for x
    x = 5,292,219,292.26/67,389.40
  6. Step 6: Final answer
    x = 78,531.92

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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.