Home / 121,148.20-181,895.10-91,772.20

Finding the Fourth Proportional to 121,148.20, 181,895.10 and 91,772.20

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Solution

The fourth proportional to 121,148.20, 181,895.10 and 91,772.20 is: 137,789.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,148.20 : 181,895.10 = 91,772.20 : x
  2. Step 2: Convert to fraction form
    121,148.20/181,895.10 = 91,772.20/x
  3. Step 3: Cross multiply
    121,148.20x = 181,895.10 × 91,772.20
  4. Step 4: Simplify right side
    121,148.20x = 16,692,913,496.22
  5. Step 5: Solve for x
    x = 16,692,913,496.22/121,148.20
  6. Step 6: Final answer
    x = 137,789.20

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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.