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Finding the Fourth Proportional to 115,020.80, 158,717.80 and 64,716.56

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Solution

The fourth proportional to 115,020.80, 158,717.80 and 64,716.56 is: 89,302.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,020.80 : 158,717.80 = 64,716.56 : x
  2. Step 2: Convert to fraction form
    115,020.80/158,717.80 = 64,716.56/x
  3. Step 3: Cross multiply
    115,020.80x = 158,717.80 × 64,716.56
  4. Step 4: Simplify right side
    115,020.80x = 10,271,670,026.77
  5. Step 5: Solve for x
    x = 10,271,670,026.77/115,020.80
  6. Step 6: Final answer
    x = 89,302.72

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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.