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Finding the Fourth Proportional to 105,555.88, 145,660.44 and 57,809.80

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Solution

The fourth proportional to 105,555.88, 145,660.44 and 57,809.80 is: 79,773.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,555.88 : 145,660.44 = 57,809.80 : x
  2. Step 2: Convert to fraction form
    105,555.88/145,660.44 = 57,809.80/x
  3. Step 3: Cross multiply
    105,555.88x = 145,660.44 × 57,809.80
  4. Step 4: Simplify right side
    105,555.88x = 8,420,600,904.31
  5. Step 5: Solve for x
    x = 8,420,600,904.31/105,555.88
  6. Step 6: Final answer
    x = 79,773.87

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1.5x scale

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.