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Finding the Fourth Proportional to 157,668.10, 236,502.15 and 86,809.30

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Solution

The fourth proportional to 157,668.10, 236,502.15 and 86,809.30 is: 130,213.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,668.10 : 236,502.15 = 86,809.30 : x
  2. Step 2: Convert to fraction form
    157,668.10/236,502.15 = 86,809.30/x
  3. Step 3: Cross multiply
    157,668.10x = 236,502.15 × 86,809.30
  4. Step 4: Simplify right side
    157,668.10x = 20,530,586,090.00
  5. Step 5: Solve for x
    x = 20,530,586,090.00/157,668.10
  6. Step 6: Final answer
    x = 130,213.95

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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.