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Finding the Fourth Proportional to 115,685.81, 159,654.54 and 64,703.28

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Solution

The fourth proportional to 115,685.81, 159,654.54 and 64,703.28 is: 89,295.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,685.81 : 159,654.54 = 64,703.28 : x
  2. Step 2: Convert to fraction form
    115,685.81/159,654.54 = 64,703.28/x
  3. Step 3: Cross multiply
    115,685.81x = 159,654.54 × 64,703.28
  4. Step 4: Simplify right side
    115,685.81x = 10,330,172,404.89
  5. Step 5: Solve for x
    x = 10,330,172,404.89/115,685.81
  6. Step 6: Final answer
    x = 89,295.07

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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.