Home / 66,785.43-100,155.08-19,387.67

Finding the Fourth Proportional to 66,785.43, 100,155.08 and 19,387.67

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Solution

The fourth proportional to 66,785.43, 100,155.08 and 19,387.67 is: 29,074.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,785.43 : 100,155.08 = 19,387.67 : x
  2. Step 2: Convert to fraction form
    66,785.43/100,155.08 = 19,387.67/x
  3. Step 3: Cross multiply
    66,785.43x = 100,155.08 × 19,387.67
  4. Step 4: Simplify right side
    66,785.43x = 1,941,773,639.86
  5. Step 5: Solve for x
    x = 1,941,773,639.86/66,785.43
  6. Step 6: Final answer
    x = 29,074.81

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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.