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Finding the Fourth Proportional to 70,917.80, 97,866.08 and 39,086.72

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Solution

The fourth proportional to 70,917.80, 97,866.08 and 39,086.72 is: 53,939.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,917.80 : 97,866.08 = 39,086.72 : x
  2. Step 2: Convert to fraction form
    70,917.80/97,866.08 = 39,086.72/x
  3. Step 3: Cross multiply
    70,917.80x = 97,866.08 × 39,086.72
  4. Step 4: Simplify right side
    70,917.80x = 3,825,264,066.46
  5. Step 5: Solve for x
    x = 3,825,264,066.46/70,917.80
  6. Step 6: Final answer
    x = 53,939.41

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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.