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Finding the Fourth Proportional to 104,646.66, 156,969.96 and 86,103.72

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Solution

The fourth proportional to 104,646.66, 156,969.96 and 86,103.72 is: 129,155.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,646.66 : 156,969.96 = 86,103.72 : x
  2. Step 2: Convert to fraction form
    104,646.66/156,969.96 = 86,103.72/x
  3. Step 3: Cross multiply
    104,646.66x = 156,969.96 × 86,103.72
  4. Step 4: Simplify right side
    104,646.66x = 13,515,697,484.25
  5. Step 5: Solve for x
    x = 13,515,697,484.25/104,646.66
  6. Step 6: Final answer
    x = 129,155.56

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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.