Home / 139,944.64-193,128.16-79,511.70

Finding the Fourth Proportional to 139,944.64, 193,128.16 and 79,511.70

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Solution

The fourth proportional to 139,944.64, 193,128.16 and 79,511.70 is: 109,728.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,944.64 : 193,128.16 = 79,511.70 : x
  2. Step 2: Convert to fraction form
    139,944.64/193,128.16 = 79,511.70/x
  3. Step 3: Cross multiply
    139,944.64x = 193,128.16 × 79,511.70
  4. Step 4: Simplify right side
    139,944.64x = 15,355,948,319.47
  5. Step 5: Solve for x
    x = 15,355,948,319.47/139,944.64
  6. Step 6: Final answer
    x = 109,728.74

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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.