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Finding the Fourth Proportional to 70,862.97, 97,790.89 and 39,031.87

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Solution

The fourth proportional to 70,862.97, 97,790.89 and 39,031.87 is: 53,863.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,862.97 : 97,790.89 = 39,031.87 : x
  2. Step 2: Convert to fraction form
    70,862.97/97,790.89 = 39,031.87/x
  3. Step 3: Cross multiply
    70,862.97x = 97,790.89 × 39,031.87
  4. Step 4: Simplify right side
    70,862.97x = 3,816,961,305.66
  5. Step 5: Solve for x
    x = 3,816,961,305.66/70,862.97
  6. Step 6: Final answer
    x = 53,863.98

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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.