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Finding the Fourth Proportional to 70,819.98, 97,731.96 and 38,988.89

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Solution

The fourth proportional to 70,819.98, 97,731.96 and 38,988.89 is: 53,804.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,819.98 : 97,731.96 = 38,988.89 : x
  2. Step 2: Convert to fraction form
    70,819.98/97,731.96 = 38,988.89/x
  3. Step 3: Cross multiply
    70,819.98x = 97,731.96 × 38,988.89
  4. Step 4: Simplify right side
    70,819.98x = 3,810,460,149.26
  5. Step 5: Solve for x
    x = 3,810,460,149.26/70,819.98
  6. Step 6: Final answer
    x = 53,804.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.