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Finding the Fourth Proportional to 86,644.71, 129,979.46 and 26,678.26

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Solution

The fourth proportional to 86,644.71, 129,979.46 and 26,678.26 is: 40,021.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,644.71 : 129,979.46 = 26,678.26 : x
  2. Step 2: Convert to fraction form
    86,644.71/129,979.46 = 26,678.26/x
  3. Step 3: Cross multiply
    86,644.71x = 129,979.46 × 26,678.26
  4. Step 4: Simplify right side
    86,644.71x = 3,467,625,828.54
  5. Step 5: Solve for x
    x = 3,467,625,828.54/86,644.71
  6. Step 6: Final answer
    x = 40,021.21

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1.5x scale

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.