Home / 81,328.65-121,962.79-28,005.74

Finding the Fourth Proportional to 81,328.65, 121,962.79 and 28,005.74

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Solution

The fourth proportional to 81,328.65, 121,962.79 and 28,005.74 is: 41,998.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,328.65 : 121,962.79 = 28,005.74 : x
  2. Step 2: Convert to fraction form
    81,328.65/121,962.79 = 28,005.74/x
  3. Step 3: Cross multiply
    81,328.65x = 121,962.79 × 28,005.74
  4. Step 4: Simplify right side
    81,328.65x = 3,415,658,186.41
  5. Step 5: Solve for x
    x = 3,415,658,186.41/81,328.65
  6. Step 6: Final answer
    x = 41,998.22

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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.