Home / 139,258.34-192,177.09-78,840.65

Finding the Fourth Proportional to 139,258.34, 192,177.09 and 78,840.65

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Solution

The fourth proportional to 139,258.34, 192,177.09 and 78,840.65 is: 108,800.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,258.34 : 192,177.09 = 78,840.65 : x
  2. Step 2: Convert to fraction form
    139,258.34/192,177.09 = 78,840.65/x
  3. Step 3: Cross multiply
    139,258.34x = 192,177.09 × 78,840.65
  4. Step 4: Simplify right side
    139,258.34x = 15,151,366,690.71
  5. Step 5: Solve for x
    x = 15,151,366,690.71/139,258.34
  6. Step 6: Final answer
    x = 108,800.43

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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.