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Finding the Fourth Proportional to 261,813.35, 392,742.76 and 72,273.86

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Solution

The fourth proportional to 261,813.35, 392,742.76 and 72,273.86 is: 108,417.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,813.35 : 392,742.76 = 72,273.86 : x
  2. Step 2: Convert to fraction form
    261,813.35/392,742.76 = 72,273.86/x
  3. Step 3: Cross multiply
    261,813.35x = 392,742.76 × 72,273.86
  4. Step 4: Simplify right side
    261,813.35x = 28,385,035,252.25
  5. Step 5: Solve for x
    x = 28,385,035,252.25/261,813.35
  6. Step 6: Final answer
    x = 108,417.07

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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.