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Finding the Fourth Proportional to 67,971.80, 101,909.10 and 30,501.20

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Solution

The fourth proportional to 67,971.80, 101,909.10 and 30,501.20 is: 45,729.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,971.80 : 101,909.10 = 30,501.20 : x
  2. Step 2: Convert to fraction form
    67,971.80/101,909.10 = 30,501.20/x
  3. Step 3: Cross multiply
    67,971.80x = 101,909.10 × 30,501.20
  4. Step 4: Simplify right side
    67,971.80x = 3,108,349,840.92
  5. Step 5: Solve for x
    x = 3,108,349,840.92/67,971.80
  6. Step 6: Final answer
    x = 45,729.99

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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.