Home / 148,939.64-205,531.50-81,871.16

Finding the Fourth Proportional to 148,939.64, 205,531.50 and 81,871.16

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Solution

The fourth proportional to 148,939.64, 205,531.50 and 81,871.16 is: 112,979.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,939.64 : 205,531.50 = 81,871.16 : x
  2. Step 2: Convert to fraction form
    148,939.64/205,531.50 = 81,871.16/x
  3. Step 3: Cross multiply
    148,939.64x = 205,531.50 × 81,871.16
  4. Step 4: Simplify right side
    148,939.64x = 16,827,102,321.54
  5. Step 5: Solve for x
    x = 16,827,102,321.54/148,939.64
  6. Step 6: Final answer
    x = 112,979.34

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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.