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Finding the Fourth Proportional to 71,999.40, 107,999.10 and 65,110.35

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Solution

The fourth proportional to 71,999.40, 107,999.10 and 65,110.35 is: 97,665.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,999.40 : 107,999.10 = 65,110.35 : x
  2. Step 2: Convert to fraction form
    71,999.40/107,999.10 = 65,110.35/x
  3. Step 3: Cross multiply
    71,999.40x = 107,999.10 × 65,110.35
  4. Step 4: Simplify right side
    71,999.40x = 7,031,859,200.69
  5. Step 5: Solve for x
    x = 7,031,859,200.69/71,999.40
  6. Step 6: Final answer
    x = 97,665.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.