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Finding the Fourth Proportional to 72,916.99, 109,375.95 and 20,326.93

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Solution

The fourth proportional to 72,916.99, 109,375.95 and 20,326.93 is: 30,490.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,916.99 : 109,375.95 = 20,326.93 : x
  2. Step 2: Convert to fraction form
    72,916.99/109,375.95 = 20,326.93/x
  3. Step 3: Cross multiply
    72,916.99x = 109,375.95 × 20,326.93
  4. Step 4: Simplify right side
    72,916.99x = 2,223,277,279.33
  5. Step 5: Solve for x
    x = 2,223,277,279.33/72,916.99
  6. Step 6: Final answer
    x = 30,490.52

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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.