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Finding the Fourth Proportional to 121,344.30, 181,579.05 and 81,978.30

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Solution

The fourth proportional to 121,344.30, 181,579.05 and 81,978.30 is: 122,671.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,344.30 : 181,579.05 = 81,978.30 : x
  2. Step 2: Convert to fraction form
    121,344.30/181,579.05 = 81,978.30/x
  3. Step 3: Cross multiply
    121,344.30x = 181,579.05 × 81,978.30
  4. Step 4: Simplify right side
    121,344.30x = 14,885,541,834.62
  5. Step 5: Solve for x
    x = 14,885,541,834.62/121,344.30
  6. Step 6: Final answer
    x = 122,671.95

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1.5x scale

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.