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Finding the Fourth Proportional to 104,140, 156,257.60 and 56,684

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Solution

The fourth proportional to 104,140, 156,257.60 and 56,684 is: 85,051.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,140 : 156,257.60 = 56,684 : x
  2. Step 2: Convert to fraction form
    104,140/156,257.60 = 56,684/x
  3. Step 3: Cross multiply
    104,140x = 156,257.60 × 56,684
  4. Step 4: Simplify right side
    104,140x = 8,857,305,798.40
  5. Step 5: Solve for x
    x = 8,857,305,798.40/104,140
  6. Step 6: Final answer
    x = 85,051.91

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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.