Home / 72,787.20-109,065.36-56,187.86

Finding the Fourth Proportional to 72,787.20, 109,065.36 and 56,187.86

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Solution

The fourth proportional to 72,787.20, 109,065.36 and 56,187.86 is: 84,192.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,787.20 : 109,065.36 = 56,187.86 : x
  2. Step 2: Convert to fraction form
    72,787.20/109,065.36 = 56,187.86/x
  3. Step 3: Cross multiply
    72,787.20x = 109,065.36 × 56,187.86
  4. Step 4: Simplify right side
    72,787.20x = 6,128,149,178.53
  5. Step 5: Solve for x
    x = 6,128,149,178.53/72,787.20
  6. Step 6: Final answer
    x = 84,192.68

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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.