Home / 105,521.60-145,614.03-57,765.71

Finding the Fourth Proportional to 105,521.60, 145,614.03 and 57,765.71

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Solution

The fourth proportional to 105,521.60, 145,614.03 and 57,765.71 is: 79,713.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,521.60 : 145,614.03 = 57,765.71 : x
  2. Step 2: Convert to fraction form
    105,521.60/145,614.03 = 57,765.71/x
  3. Step 3: Cross multiply
    105,521.60x = 145,614.03 × 57,765.71
  4. Step 4: Simplify right side
    105,521.60x = 8,411,497,100.84
  5. Step 5: Solve for x
    x = 8,411,497,100.84/105,521.60
  6. Step 6: Final answer
    x = 79,713.51

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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.