Home / 128,530.52-177,346.91-80,756.19

Finding the Fourth Proportional to 128,530.52, 177,346.91 and 80,756.19

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Solution

The fourth proportional to 128,530.52, 177,346.91 and 80,756.19 is: 111,427.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,530.52 : 177,346.91 = 80,756.19 : x
  2. Step 2: Convert to fraction form
    128,530.52/177,346.91 = 80,756.19/x
  3. Step 3: Cross multiply
    128,530.52x = 177,346.91 × 80,756.19
  4. Step 4: Simplify right side
    128,530.52x = 14,321,860,759.87
  5. Step 5: Solve for x
    x = 14,321,860,759.87/128,530.52
  6. Step 6: Final answer
    x = 111,427.70

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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.