Home / 131,728.77-197,168.88-86,787.24

Finding the Fourth Proportional to 131,728.77, 197,168.88 and 86,787.24

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Solution

The fourth proportional to 131,728.77, 197,168.88 and 86,787.24 is: 129,901.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,728.77 : 197,168.88 = 86,787.24 : x
  2. Step 2: Convert to fraction form
    131,728.77/197,168.88 = 86,787.24/x
  3. Step 3: Cross multiply
    131,728.77x = 197,168.88 × 86,787.24
  4. Step 4: Simplify right side
    131,728.77x = 17,111,742,909.09
  5. Step 5: Solve for x
    x = 17,111,742,909.09/131,728.77
  6. Step 6: Final answer
    x = 129,901.33

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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.