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Finding the Fourth Proportional to 261,811.95, 392,710.08 and 72,283.89

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Solution

The fourth proportional to 261,811.95, 392,710.08 and 72,283.89 is: 108,423.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,811.95 : 392,710.08 = 72,283.89 : x
  2. Step 2: Convert to fraction form
    261,811.95/392,710.08 = 72,283.89/x
  3. Step 3: Cross multiply
    261,811.95x = 392,710.08 × 72,283.89
  4. Step 4: Simplify right side
    261,811.95x = 28,386,611,352.75
  5. Step 5: Solve for x
    x = 28,386,611,352.75/261,811.95
  6. Step 6: Final answer
    x = 108,423.66

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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.