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Finding the Fourth Proportional to 261,898.95, 392,848.42 and 74,910.45

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Solution

The fourth proportional to 261,898.95, 392,848.42 and 74,910.45 is: 112,365.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,898.95 : 392,848.42 = 74,910.45 : x
  2. Step 2: Convert to fraction form
    261,898.95/392,848.42 = 74,910.45/x
  3. Step 3: Cross multiply
    261,898.95x = 392,848.42 × 74,910.45
  4. Step 4: Simplify right side
    261,898.95x = 29,428,449,930.35
  5. Step 5: Solve for x
    x = 29,428,449,930.35/261,898.95
  6. Step 6: Final answer
    x = 112,365.67

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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.