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Finding the Fourth Proportional to 108,902, 149,818.20 and 104,236.40

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Solution

The fourth proportional to 108,902, 149,818.20 and 104,236.40 is: 143,399.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,902 : 149,818.20 = 104,236.40 : x
  2. Step 2: Convert to fraction form
    108,902/149,818.20 = 104,236.40/x
  3. Step 3: Cross multiply
    108,902x = 149,818.20 × 104,236.40
  4. Step 4: Simplify right side
    108,902x = 15,616,509,822.48
  5. Step 5: Solve for x
    x = 15,616,509,822.48/108,902
  6. Step 6: Final answer
    x = 143,399.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.