Home / 81,432.81-122,109.12-38,726.37

Finding the Fourth Proportional to 81,432.81, 122,109.12 and 38,726.37

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Solution

The fourth proportional to 81,432.81, 122,109.12 and 38,726.37 is: 58,070.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,432.81 : 122,109.12 = 38,726.37 : x
  2. Step 2: Convert to fraction form
    81,432.81/122,109.12 = 38,726.37/x
  3. Step 3: Cross multiply
    81,432.81x = 122,109.12 × 38,726.37
  4. Step 4: Simplify right side
    81,432.81x = 4,728,842,961.49
  5. Step 5: Solve for x
    x = 4,728,842,961.49/81,432.81
  6. Step 6: Final answer
    x = 58,070.49

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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.