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Finding the Fourth Proportional to 70,918.92, 97,870.20 and 39,089.88

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Solution

The fourth proportional to 70,918.92, 97,870.20 and 39,089.88 is: 53,945.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,918.92 : 97,870.20 = 39,089.88 : x
  2. Step 2: Convert to fraction form
    70,918.92/97,870.20 = 39,089.88/x
  3. Step 3: Cross multiply
    70,918.92x = 97,870.20 × 39,089.88
  4. Step 4: Simplify right side
    70,918.92x = 3,825,734,373.58
  5. Step 5: Solve for x
    x = 3,825,734,373.58/70,918.92
  6. Step 6: Final answer
    x = 53,945.19

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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.