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Finding the Fourth Proportional to 261,880.84, 392,813.46 and 72,352.56

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Solution

The fourth proportional to 261,880.84, 392,813.46 and 72,352.56 is: 108,526.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,880.84 : 392,813.46 = 72,352.56 : x
  2. Step 2: Convert to fraction form
    261,880.84/392,813.46 = 72,352.56/x
  3. Step 3: Cross multiply
    261,880.84x = 392,813.46 × 72,352.56
  4. Step 4: Simplify right side
    261,880.84x = 28,421,059,433.46
  5. Step 5: Solve for x
    x = 28,421,059,433.46/261,880.84
  6. Step 6: Final answer
    x = 108,526.69

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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.