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Finding the Fourth Proportional to 208,098.45, 312,187.04 and 65,979.52

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Solution

The fourth proportional to 208,098.45, 312,187.04 and 65,979.52 is: 98,981.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,098.45 : 312,187.04 = 65,979.52 : x
  2. Step 2: Convert to fraction form
    208,098.45/312,187.04 = 65,979.52/x
  3. Step 3: Cross multiply
    208,098.45x = 312,187.04 × 65,979.52
  4. Step 4: Simplify right side
    208,098.45x = 20,597,950,557.61
  5. Step 5: Solve for x
    x = 20,597,950,557.61/208,098.45
  6. Step 6: Final answer
    x = 98,981.76

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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.