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Finding the Fourth Proportional to 108,776.61, 163,145.45 and 69,216.21

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Solution

The fourth proportional to 108,776.61, 163,145.45 and 69,216.21 is: 103,811.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,776.61 : 163,145.45 = 69,216.21 : x
  2. Step 2: Convert to fraction form
    108,776.61/163,145.45 = 69,216.21/x
  3. Step 3: Cross multiply
    108,776.61x = 163,145.45 × 69,216.21
  4. Step 4: Simplify right side
    108,776.61x = 11,292,309,727.74
  5. Step 5: Solve for x
    x = 11,292,309,727.74/108,776.61
  6. Step 6: Final answer
    x = 103,811.93

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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.