Home / 139,280.06-192,216.66-78,031.64

Finding the Fourth Proportional to 139,280.06, 192,216.66 and 78,031.64

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Solution

The fourth proportional to 139,280.06, 192,216.66 and 78,031.64 is: 107,689.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,280.06 : 192,216.66 = 78,031.64 : x
  2. Step 2: Convert to fraction form
    139,280.06/192,216.66 = 78,031.64/x
  3. Step 3: Cross multiply
    139,280.06x = 192,216.66 × 78,031.64
  4. Step 4: Simplify right side
    139,280.06x = 14,998,981,215.12
  5. Step 5: Solve for x
    x = 14,998,981,215.12/139,280.06
  6. Step 6: Final answer
    x = 107,689.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.