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Finding the Fourth Proportional to 272,557.61, 408,811.35 and 72,870.84

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Solution

The fourth proportional to 272,557.61, 408,811.35 and 72,870.84 is: 109,299.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,557.61 : 408,811.35 = 72,870.84 : x
  2. Step 2: Convert to fraction form
    272,557.61/408,811.35 = 72,870.84/x
  3. Step 3: Cross multiply
    272,557.61x = 408,811.35 × 72,870.84
  4. Step 4: Simplify right side
    272,557.61x = 29,790,426,749.30
  5. Step 5: Solve for x
    x = 29,790,426,749.30/272,557.61
  6. Step 6: Final answer
    x = 109,299.56

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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.