Home / 163,853.20-245,787.90-85,121.20

Finding the Fourth Proportional to 163,853.20, 245,787.90 and 85,121.20

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Solution

The fourth proportional to 163,853.20, 245,787.90 and 85,121.20 is: 127,686.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,853.20 : 245,787.90 = 85,121.20 : x
  2. Step 2: Convert to fraction form
    163,853.20/245,787.90 = 85,121.20/x
  3. Step 3: Cross multiply
    163,853.20x = 245,787.90 × 85,121.20
  4. Step 4: Simplify right side
    163,853.20x = 20,921,760,993.48
  5. Step 5: Solve for x
    x = 20,921,760,993.48/163,853.20
  6. Step 6: Final answer
    x = 127,686.01

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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.