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Finding the Fourth Proportional to 208,545.80, 312,818.70 and 119,972.30

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Solution

The fourth proportional to 208,545.80, 312,818.70 and 119,972.30 is: 179,958.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,545.80 : 312,818.70 = 119,972.30 : x
  2. Step 2: Convert to fraction form
    208,545.80/312,818.70 = 119,972.30/x
  3. Step 3: Cross multiply
    208,545.80x = 312,818.70 × 119,972.30
  4. Step 4: Simplify right side
    208,545.80x = 37,529,578,922.01
  5. Step 5: Solve for x
    x = 37,529,578,922.01/208,545.80
  6. Step 6: Final answer
    x = 179,958.45

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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.