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Finding the Fourth Proportional to 78,588.64, 117,883.05 and 19,423.41

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Solution

The fourth proportional to 78,588.64, 117,883.05 and 19,423.41 is: 29,135.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,588.64 : 117,883.05 = 19,423.41 : x
  2. Step 2: Convert to fraction form
    78,588.64/117,883.05 = 19,423.41/x
  3. Step 3: Cross multiply
    78,588.64x = 117,883.05 × 19,423.41
  4. Step 4: Simplify right side
    78,588.64x = 2,289,690,812.20
  5. Step 5: Solve for x
    x = 2,289,690,812.20/78,588.64
  6. Step 6: Final answer
    x = 29,135.14

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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.