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Finding the Fourth Proportional to 65,968.70, 98,977.95 and 39,691.89

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Solution

The fourth proportional to 65,968.70, 98,977.95 and 39,691.89 is: 59,552.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,968.70 : 98,977.95 = 39,691.89 : x
  2. Step 2: Convert to fraction form
    65,968.70/98,977.95 = 39,691.89/x
  3. Step 3: Cross multiply
    65,968.70x = 98,977.95 × 39,691.89
  4. Step 4: Simplify right side
    65,968.70x = 3,928,621,903.83
  5. Step 5: Solve for x
    x = 3,928,621,903.83/65,968.70
  6. Step 6: Final answer
    x = 59,552.82

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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.