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Finding the Fourth Proportional to 70,917.68, 97,866.85 and 39,086.58

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Solution

The fourth proportional to 70,917.68, 97,866.85 and 39,086.58 is: 53,939.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,917.68 : 97,866.85 = 39,086.58 : x
  2. Step 2: Convert to fraction form
    70,917.68/97,866.85 = 39,086.58/x
  3. Step 3: Cross multiply
    70,917.68x = 97,866.85 × 39,086.58
  4. Step 4: Simplify right side
    70,917.68x = 3,825,279,813.80
  5. Step 5: Solve for x
    x = 3,825,279,813.80/70,917.68
  6. Step 6: Final answer
    x = 53,939.72

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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.