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Finding the Fourth Proportional to 70,862.60, 97,790.38 and 39,031.50

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Solution

The fourth proportional to 70,862.60, 97,790.38 and 39,031.50 is: 53,863.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,862.60 : 97,790.38 = 39,031.50 : x
  2. Step 2: Convert to fraction form
    70,862.60/97,790.38 = 39,031.50/x
  3. Step 3: Cross multiply
    70,862.60x = 97,790.38 × 39,031.50
  4. Step 4: Simplify right side
    70,862.60x = 3,816,904,752.68
  5. Step 5: Solve for x
    x = 3,816,904,752.68/70,862.60
  6. Step 6: Final answer
    x = 53,863.46

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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.