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Finding the Fourth Proportional to 153,579.78, 211,758.84 and 105,204.96

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Solution

The fourth proportional to 153,579.78, 211,758.84 and 105,204.96 is: 145,058.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,579.78 : 211,758.84 = 105,204.96 : x
  2. Step 2: Convert to fraction form
    153,579.78/211,758.84 = 105,204.96/x
  3. Step 3: Cross multiply
    153,579.78x = 211,758.84 × 105,204.96
  4. Step 4: Simplify right side
    153,579.78x = 22,278,080,291.85
  5. Step 5: Solve for x
    x = 22,278,080,291.85/153,579.78
  6. Step 6: Final answer
    x = 145,058.68

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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.