Home / 121,149.10-181,723.65-74,428.30

Finding the Fourth Proportional to 121,149.10, 181,723.65 and 74,428.30

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Solution

The fourth proportional to 121,149.10, 181,723.65 and 74,428.30 is: 111,642.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,149.10 : 181,723.65 = 74,428.30 : x
  2. Step 2: Convert to fraction form
    121,149.10/181,723.65 = 74,428.30/x
  3. Step 3: Cross multiply
    121,149.10x = 181,723.65 × 74,428.30
  4. Step 4: Simplify right side
    121,149.10x = 13,525,382,339.30
  5. Step 5: Solve for x
    x = 13,525,382,339.30/121,149.10
  6. Step 6: Final answer
    x = 111,642.45

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1.5x scale

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.