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Finding the Fourth Proportional to 221,923.28, 306,254.28 and 121,321.28

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Solution

The fourth proportional to 221,923.28, 306,254.28 and 121,321.28 is: 167,423.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,923.28 : 306,254.28 = 121,321.28 : x
  2. Step 2: Convert to fraction form
    221,923.28/306,254.28 = 121,321.28/x
  3. Step 3: Cross multiply
    221,923.28x = 306,254.28 × 121,321.28
  4. Step 4: Simplify right side
    221,923.28x = 37,155,161,255.08
  5. Step 5: Solve for x
    x = 37,155,161,255.08/221,923.28
  6. Step 6: Final answer
    x = 167,423.45

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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.