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Finding the Fourth Proportional to 70,862.70, 97,790.51 and 39,031.60

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Solution

The fourth proportional to 70,862.70, 97,790.51 and 39,031.60 is: 53,863.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,862.70 : 97,790.51 = 39,031.60 : x
  2. Step 2: Convert to fraction form
    70,862.70/97,790.51 = 39,031.60/x
  3. Step 3: Cross multiply
    70,862.70x = 97,790.51 × 39,031.60
  4. Step 4: Simplify right side
    70,862.70x = 3,816,919,581.16
  5. Step 5: Solve for x
    x = 3,816,919,581.16/70,862.70
  6. Step 6: Final answer
    x = 53,863.60

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1.5x scale

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.