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Finding the Fourth Proportional to 153,812.52, 212,261.26 and 86,744.52

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Solution

The fourth proportional to 153,812.52, 212,261.26 and 86,744.52 is: 119,707.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,812.52 : 212,261.26 = 86,744.52 : x
  2. Step 2: Convert to fraction form
    153,812.52/212,261.26 = 86,744.52/x
  3. Step 3: Cross multiply
    153,812.52x = 212,261.26 × 86,744.52
  4. Step 4: Simplify right side
    153,812.52x = 18,412,501,113.30
  5. Step 5: Solve for x
    x = 18,412,501,113.30/153,812.52
  6. Step 6: Final answer
    x = 119,707.43

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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.