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Finding the Fourth Proportional to 101,978.60, 152,908.50 and 39,576.20

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Solution

The fourth proportional to 101,978.60, 152,908.50 and 39,576.20 is: 59,341.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,978.60 : 152,908.50 = 39,576.20 : x
  2. Step 2: Convert to fraction form
    101,978.60/152,908.50 = 39,576.20/x
  3. Step 3: Cross multiply
    101,978.60x = 152,908.50 × 39,576.20
  4. Step 4: Simplify right side
    101,978.60x = 6,051,537,377.70
  5. Step 5: Solve for x
    x = 6,051,537,377.70/101,978.60
  6. Step 6: Final answer
    x = 59,341.25

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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.