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Finding the Fourth Proportional to 86,644.80, 129,979.60 and 26,678.35

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Solution

The fourth proportional to 86,644.80, 129,979.60 and 26,678.35 is: 40,021.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,644.80 : 129,979.60 = 26,678.35 : x
  2. Step 2: Convert to fraction form
    86,644.80/129,979.60 = 26,678.35/x
  3. Step 3: Cross multiply
    86,644.80x = 129,979.60 × 26,678.35
  4. Step 4: Simplify right side
    86,644.80x = 3,467,641,261.66
  5. Step 5: Solve for x
    x = 3,467,641,261.66/86,644.80
  6. Step 6: Final answer
    x = 40,021.34

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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.