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Finding the Fourth Proportional to 153,261.72, 229,593.60 and 86,499.88

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Solution

The fourth proportional to 153,261.72, 229,593.60 and 86,499.88 is: 129,581.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,261.72 : 229,593.60 = 86,499.88 : x
  2. Step 2: Convert to fraction form
    153,261.72/229,593.60 = 86,499.88/x
  3. Step 3: Cross multiply
    153,261.72x = 229,593.60 × 86,499.88
  4. Step 4: Simplify right side
    153,261.72x = 19,859,818,848.77
  5. Step 5: Solve for x
    x = 19,859,818,848.77/153,261.72
  6. Step 6: Final answer
    x = 129,581.08

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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.