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Finding the Fourth Proportional to 108,381.16, 149,456.10 and 65,898.28

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Solution

The fourth proportional to 108,381.16, 149,456.10 and 65,898.28 is: 90,872.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,381.16 : 149,456.10 = 65,898.28 : x
  2. Step 2: Convert to fraction form
    108,381.16/149,456.10 = 65,898.28/x
  3. Step 3: Cross multiply
    108,381.16x = 149,456.10 × 65,898.28
  4. Step 4: Simplify right side
    108,381.16x = 9,848,899,925.51
  5. Step 5: Solve for x
    x = 9,848,899,925.51/108,381.16
  6. Step 6: Final answer
    x = 90,872.80

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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.