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Finding the Fourth Proportional to 104,136, 156,251.60 and 56,680

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Solution

The fourth proportional to 104,136, 156,251.60 and 56,680 is: 85,045.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,136 : 156,251.60 = 56,680 : x
  2. Step 2: Convert to fraction form
    104,136/156,251.60 = 56,680/x
  3. Step 3: Cross multiply
    104,136x = 156,251.60 × 56,680
  4. Step 4: Simplify right side
    104,136x = 8,856,340,688
  5. Step 5: Solve for x
    x = 8,856,340,688/104,136
  6. Step 6: Final answer
    x = 85,045.91

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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.