Home / 105,619.32-145,750.32-57,871.44

Finding the Fourth Proportional to 105,619.32, 145,750.32 and 57,871.44

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Solution

The fourth proportional to 105,619.32, 145,750.32 and 57,871.44 is: 79,860.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,619.32 : 145,750.32 = 57,871.44 : x
  2. Step 2: Convert to fraction form
    105,619.32/145,750.32 = 57,871.44/x
  3. Step 3: Cross multiply
    105,619.32x = 145,750.32 × 57,871.44
  4. Step 4: Simplify right side
    105,619.32x = 8,434,780,898.86
  5. Step 5: Solve for x
    x = 8,434,780,898.86/105,619.32
  6. Step 6: Final answer
    x = 79,860.21

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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.