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Finding the Fourth Proportional to 108,773.61, 163,140.95 and 69,213.21

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Solution

The fourth proportional to 108,773.61, 163,140.95 and 69,213.21 is: 103,807.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,773.61 : 163,140.95 = 69,213.21 : x
  2. Step 2: Convert to fraction form
    108,773.61/163,140.95 = 69,213.21/x
  3. Step 3: Cross multiply
    108,773.61x = 163,140.95 × 69,213.21
  4. Step 4: Simplify right side
    108,773.61x = 11,291,508,831.95
  5. Step 5: Solve for x
    x = 11,291,508,831.95/108,773.61
  6. Step 6: Final answer
    x = 103,807.43

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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.