Home / 149,798.81-206,722.02-81,815.78

Finding the Fourth Proportional to 149,798.81, 206,722.02 and 81,815.78

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Solution

The fourth proportional to 149,798.81, 206,722.02 and 81,815.78 is: 112,905.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,798.81 : 206,722.02 = 81,815.78 : x
  2. Step 2: Convert to fraction form
    149,798.81/206,722.02 = 81,815.78/x
  3. Step 3: Cross multiply
    149,798.81x = 206,722.02 × 81,815.78
  4. Step 4: Simplify right side
    149,798.81x = 16,913,123,309.48
  5. Step 5: Solve for x
    x = 16,913,123,309.48/149,798.81
  6. Step 6: Final answer
    x = 112,905.59

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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.