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Finding the Fourth Proportional to 104,493.60, 156,778.80 and 42,170.40

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Solution

The fourth proportional to 104,493.60, 156,778.80 and 42,170.40 is: 63,271.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,493.60 : 156,778.80 = 42,170.40 : x
  2. Step 2: Convert to fraction form
    104,493.60/156,778.80 = 42,170.40/x
  3. Step 3: Cross multiply
    104,493.60x = 156,778.80 × 42,170.40
  4. Step 4: Simplify right side
    104,493.60x = 6,611,424,707.52
  5. Step 5: Solve for x
    x = 6,611,424,707.52/104,493.60
  6. Step 6: Final answer
    x = 63,271.10

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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.