Home / 128,811.42-193,249.86-40,065.60

Finding the Fourth Proportional to 128,811.42, 193,249.86 and 40,065.60

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Solution

The fourth proportional to 128,811.42, 193,249.86 and 40,065.60 is: 60,108.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,811.42 : 193,249.86 = 40,065.60 : x
  2. Step 2: Convert to fraction form
    128,811.42/193,249.86 = 40,065.60/x
  3. Step 3: Cross multiply
    128,811.42x = 193,249.86 × 40,065.60
  4. Step 4: Simplify right side
    128,811.42x = 7,742,671,590.82
  5. Step 5: Solve for x
    x = 7,742,671,590.82/128,811.42
  6. Step 6: Final answer
    x = 60,108.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.