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Finding the Fourth Proportional to 156,491.78, 215,938.85 and 92,817.14

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Solution

The fourth proportional to 156,491.78, 215,938.85 and 92,817.14 is: 128,075.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,491.78 : 215,938.85 = 92,817.14 : x
  2. Step 2: Convert to fraction form
    156,491.78/215,938.85 = 92,817.14/x
  3. Step 3: Cross multiply
    156,491.78x = 215,938.85 × 92,817.14
  4. Step 4: Simplify right side
    156,491.78x = 20,042,826,471.89
  5. Step 5: Solve for x
    x = 20,042,826,471.89/156,491.78
  6. Step 6: Final answer
    x = 128,075.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.