Home / 105,561.20-145,675.18-57,816.56

Finding the Fourth Proportional to 105,561.20, 145,675.18 and 57,816.56

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Solution

The fourth proportional to 105,561.20, 145,675.18 and 57,816.56 is: 79,787.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,561.20 : 145,675.18 = 57,816.56 : x
  2. Step 2: Convert to fraction form
    105,561.20/145,675.18 = 57,816.56/x
  3. Step 3: Cross multiply
    105,561.20x = 145,675.18 × 57,816.56
  4. Step 4: Simplify right side
    105,561.20x = 8,422,437,784.98
  5. Step 5: Solve for x
    x = 8,422,437,784.98/105,561.20
  6. Step 6: Final answer
    x = 79,787.25

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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.