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Finding the Fourth Proportional to 97,427.20, 146,140.80 and 31,763.20

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Solution

The fourth proportional to 97,427.20, 146,140.80 and 31,763.20 is: 47,644.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,427.20 : 146,140.80 = 31,763.20 : x
  2. Step 2: Convert to fraction form
    97,427.20/146,140.80 = 31,763.20/x
  3. Step 3: Cross multiply
    97,427.20x = 146,140.80 × 31,763.20
  4. Step 4: Simplify right side
    97,427.20x = 4,641,899,458.56
  5. Step 5: Solve for x
    x = 4,641,899,458.56/97,427.20
  6. Step 6: Final answer
    x = 47,644.80

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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.