Home / 139,319.19-192,261.23-78,901.60

Finding the Fourth Proportional to 139,319.19, 192,261.23 and 78,901.60

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Solution

The fourth proportional to 139,319.19, 192,261.23 and 78,901.60 is: 108,884.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,319.19 : 192,261.23 = 78,901.60 : x
  2. Step 2: Convert to fraction form
    139,319.19/192,261.23 = 78,901.60/x
  3. Step 3: Cross multiply
    139,319.19x = 192,261.23 × 78,901.60
  4. Step 4: Simplify right side
    139,319.19x = 15,169,718,664.97
  5. Step 5: Solve for x
    x = 15,169,718,664.97/139,319.19
  6. Step 6: Final answer
    x = 108,884.63

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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.