Home / 100,140.06-138,149.31-59,833.65

Finding the Fourth Proportional to 100,140.06, 138,149.31 and 59,833.65

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Solution

The fourth proportional to 100,140.06, 138,149.31 and 59,833.65 is: 82,544.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,140.06 : 138,149.31 = 59,833.65 : x
  2. Step 2: Convert to fraction form
    100,140.06/138,149.31 = 59,833.65/x
  3. Step 3: Cross multiply
    100,140.06x = 138,149.31 × 59,833.65
  4. Step 4: Simplify right side
    100,140.06x = 8,265,977,462.28
  5. Step 5: Solve for x
    x = 8,265,977,462.28/100,140.06
  6. Step 6: Final answer
    x = 82,544.16

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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.