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Finding the Fourth Proportional to 157,663.13, 217,579.73 and 86,047.74

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Solution

The fourth proportional to 157,663.13, 217,579.73 and 86,047.74 is: 118,748.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,663.13 : 217,579.73 = 86,047.74 : x
  2. Step 2: Convert to fraction form
    157,663.13/217,579.73 = 86,047.74/x
  3. Step 3: Cross multiply
    157,663.13x = 217,579.73 × 86,047.74
  4. Step 4: Simplify right side
    157,663.13x = 18,722,243,606.07
  5. Step 5: Solve for x
    x = 18,722,243,606.07/157,663.13
  6. Step 6: Final answer
    x = 118,748.40

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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.