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Finding the Fourth Proportional to 70,991.80, 97,967.12 and 39,160.69

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Solution

The fourth proportional to 70,991.80, 97,967.12 and 39,160.69 is: 54,040.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,991.80 : 97,967.12 = 39,160.69 : x
  2. Step 2: Convert to fraction form
    70,991.80/97,967.12 = 39,160.69/x
  3. Step 3: Cross multiply
    70,991.80x = 97,967.12 × 39,160.69
  4. Step 4: Simplify right side
    70,991.80x = 3,836,459,575.79
  5. Step 5: Solve for x
    x = 3,836,459,575.79/70,991.80
  6. Step 6: Final answer
    x = 54,040.89

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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.