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Finding the Fourth Proportional to 261,318.70, 392,107.65 and 149,085.10

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Solution

The fourth proportional to 261,318.70, 392,107.65 and 149,085.10 is: 223,701.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,318.70 : 392,107.65 = 149,085.10 : x
  2. Step 2: Convert to fraction form
    261,318.70/392,107.65 = 149,085.10/x
  3. Step 3: Cross multiply
    261,318.70x = 392,107.65 × 149,085.10
  4. Step 4: Simplify right side
    261,318.70x = 58,457,408,211.02
  5. Step 5: Solve for x
    x = 58,457,408,211.02/261,318.70
  6. Step 6: Final answer
    x = 223,701.59

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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.