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Finding the Fourth Proportional to 121,268.90, 181,903.35 and 103,772.90

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Solution

The fourth proportional to 121,268.90, 181,903.35 and 103,772.90 is: 155,659.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,268.90 : 181,903.35 = 103,772.90 : x
  2. Step 2: Convert to fraction form
    121,268.90/181,903.35 = 103,772.90/x
  3. Step 3: Cross multiply
    121,268.90x = 181,903.35 × 103,772.90
  4. Step 4: Simplify right side
    121,268.90x = 18,876,638,149.22
  5. Step 5: Solve for x
    x = 18,876,638,149.22/121,268.90
  6. Step 6: Final answer
    x = 155,659.35

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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.