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Finding the Fourth Proportional to 153,886.70, 230,720.70 and 69,687.20

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Solution

The fourth proportional to 153,886.70, 230,720.70 and 69,687.20 is: 104,481.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,886.70 : 230,720.70 = 69,687.20 : x
  2. Step 2: Convert to fraction form
    153,886.70/230,720.70 = 69,687.20/x
  3. Step 3: Cross multiply
    153,886.70x = 230,720.70 × 69,687.20
  4. Step 4: Simplify right side
    153,886.70x = 16,078,279,565.04
  5. Step 5: Solve for x
    x = 16,078,279,565.04/153,886.70
  6. Step 6: Final answer
    x = 104,481.28

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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.