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Finding the Fourth Proportional to 153,261.94, 211,469.78 and 89,587.42

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Solution

The fourth proportional to 153,261.94, 211,469.78 and 89,587.42 is: 123,612.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,261.94 : 211,469.78 = 89,587.42 : x
  2. Step 2: Convert to fraction form
    153,261.94/211,469.78 = 89,587.42/x
  3. Step 3: Cross multiply
    153,261.94x = 211,469.78 × 89,587.42
  4. Step 4: Simplify right side
    153,261.94x = 18,945,031,998.17
  5. Step 5: Solve for x
    x = 18,945,031,998.17/153,261.94
  6. Step 6: Final answer
    x = 123,612.11

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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.