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Finding the Fourth Proportional to 272,778.95, 376,446.61 and 151,920.21

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Solution

The fourth proportional to 272,778.95, 376,446.61 and 151,920.21 is: 209,656.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,778.95 : 376,446.61 = 151,920.21 : x
  2. Step 2: Convert to fraction form
    272,778.95/376,446.61 = 151,920.21/x
  3. Step 3: Cross multiply
    272,778.95x = 376,446.61 × 151,920.21
  4. Step 4: Simplify right side
    272,778.95x = 57,189,849,646.56
  5. Step 5: Solve for x
    x = 57,189,849,646.56/272,778.95
  6. Step 6: Final answer
    x = 209,656.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.