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Finding the Fourth Proportional to 125,803.02, 188,649.12 and 66,624.86

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Solution

The fourth proportional to 125,803.02, 188,649.12 and 66,624.86 is: 99,907.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,803.02 : 188,649.12 = 66,624.86 : x
  2. Step 2: Convert to fraction form
    125,803.02/188,649.12 = 66,624.86/x
  3. Step 3: Cross multiply
    125,803.02x = 188,649.12 × 66,624.86
  4. Step 4: Simplify right side
    125,803.02x = 12,568,721,209.12
  5. Step 5: Solve for x
    x = 12,568,721,209.12/125,803.02
  6. Step 6: Final answer
    x = 99,907.95

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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.