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Finding the Fourth Proportional to 78,086.16, 117,127.08 and 21,926.70

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Solution

The fourth proportional to 78,086.16, 117,127.08 and 21,926.70 is: 32,889.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,086.16 : 117,127.08 = 21,926.70 : x
  2. Step 2: Convert to fraction form
    78,086.16/117,127.08 = 21,926.70/x
  3. Step 3: Cross multiply
    78,086.16x = 117,127.08 × 21,926.70
  4. Step 4: Simplify right side
    78,086.16x = 2,568,210,345.04
  5. Step 5: Solve for x
    x = 2,568,210,345.04/78,086.16
  6. Step 6: Final answer
    x = 32,889.44

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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.