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Finding the Fourth Proportional to 97,315.20, 145,864.80 and 38,131.20

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Solution

The fourth proportional to 97,315.20, 145,864.80 and 38,131.20 is: 57,154.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,315.20 : 145,864.80 = 38,131.20 : x
  2. Step 2: Convert to fraction form
    97,315.20/145,864.80 = 38,131.20/x
  3. Step 3: Cross multiply
    97,315.20x = 145,864.80 × 38,131.20
  4. Step 4: Simplify right side
    97,315.20x = 5,561,999,861.76
  5. Step 5: Solve for x
    x = 5,561,999,861.76/97,315.20
  6. Step 6: Final answer
    x = 57,154.48

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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.