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Finding the Fourth Proportional to 104,689.60, 156,985.80 and 45,494.80

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Solution

The fourth proportional to 104,689.60, 156,985.80 and 45,494.80 is: 68,221.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,689.60 : 156,985.80 = 45,494.80 : x
  2. Step 2: Convert to fraction form
    104,689.60/156,985.80 = 45,494.80/x
  3. Step 3: Cross multiply
    104,689.60x = 156,985.80 × 45,494.80
  4. Step 4: Simplify right side
    104,689.60x = 7,142,037,573.84
  5. Step 5: Solve for x
    x = 7,142,037,573.84/104,689.60
  6. Step 6: Final answer
    x = 68,221.08

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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.