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Finding the Fourth Proportional to 70,948.95, 97,910.21 and 39,118.98

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Solution

The fourth proportional to 70,948.95, 97,910.21 and 39,118.98 is: 53,984.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,948.95 : 97,910.21 = 39,118.98 : x
  2. Step 2: Convert to fraction form
    70,948.95/97,910.21 = 39,118.98/x
  3. Step 3: Cross multiply
    70,948.95x = 97,910.21 × 39,118.98
  4. Step 4: Simplify right side
    70,948.95x = 3,830,147,546.79
  5. Step 5: Solve for x
    x = 3,830,147,546.79/70,948.95
  6. Step 6: Final answer
    x = 53,984.56

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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.