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Finding the Fourth Proportional to 78,279.36, 117,412.89 and 22,117.20

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Solution

The fourth proportional to 78,279.36, 117,412.89 and 22,117.20 is: 33,174.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,279.36 : 117,412.89 = 22,117.20 : x
  2. Step 2: Convert to fraction form
    78,279.36/117,412.89 = 22,117.20/x
  3. Step 3: Cross multiply
    78,279.36x = 117,412.89 × 22,117.20
  4. Step 4: Simplify right side
    78,279.36x = 2,596,844,632.33
  5. Step 5: Solve for x
    x = 2,596,844,632.33/78,279.36
  6. Step 6: Final answer
    x = 33,174.06

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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.