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Finding the Fourth Proportional to 45,387.70, 68,083.79 and 12,108.07

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Solution

The fourth proportional to 45,387.70, 68,083.79 and 12,108.07 is: 18,162.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,387.70 : 68,083.79 = 12,108.07 : x
  2. Step 2: Convert to fraction form
    45,387.70/68,083.79 = 12,108.07/x
  3. Step 3: Cross multiply
    45,387.70x = 68,083.79 × 12,108.07
  4. Step 4: Simplify right side
    45,387.70x = 824,363,295.19
  5. Step 5: Solve for x
    x = 824,363,295.19/45,387.70
  6. Step 6: Final answer
    x = 18,162.70

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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.