Home / 111,683.67-154,159.38-71,505.65

Finding the Fourth Proportional to 111,683.67, 154,159.38 and 71,505.65

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Solution

The fourth proportional to 111,683.67, 154,159.38 and 71,505.65 is: 98,700.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,683.67 : 154,159.38 = 71,505.65 : x
  2. Step 2: Convert to fraction form
    111,683.67/154,159.38 = 71,505.65/x
  3. Step 3: Cross multiply
    111,683.67x = 154,159.38 × 71,505.65
  4. Step 4: Simplify right side
    111,683.67x = 11,023,265,899.70
  5. Step 5: Solve for x
    x = 11,023,265,899.70/111,683.67
  6. Step 6: Final answer
    x = 98,700.78

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1.5x scale

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.