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Finding the Fourth Proportional to 70,952.89, 97,919.40 and 39,121.74

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Solution

The fourth proportional to 70,952.89, 97,919.40 and 39,121.74 is: 53,990.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,952.89 : 97,919.40 = 39,121.74 : x
  2. Step 2: Convert to fraction form
    70,952.89/97,919.40 = 39,121.74/x
  3. Step 3: Cross multiply
    70,952.89x = 97,919.40 × 39,121.74
  4. Step 4: Simplify right side
    70,952.89x = 3,830,777,307.76
  5. Step 5: Solve for x
    x = 3,830,777,307.76/70,952.89
  6. Step 6: Final answer
    x = 53,990.43

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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.