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Finding the Fourth Proportional to 139,033.70, 208,550.55 and 86,545.70

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Solution

The fourth proportional to 139,033.70, 208,550.55 and 86,545.70 is: 129,818.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,033.70 : 208,550.55 = 86,545.70 : x
  2. Step 2: Convert to fraction form
    139,033.70/208,550.55 = 86,545.70/x
  3. Step 3: Cross multiply
    139,033.70x = 208,550.55 × 86,545.70
  4. Step 4: Simplify right side
    139,033.70x = 18,049,153,335.14
  5. Step 5: Solve for x
    x = 18,049,153,335.14/139,033.70
  6. Step 6: Final answer
    x = 129,818.55

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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.