Home / 221,921.76-306,253.24-121,319.76

Finding the Fourth Proportional to 221,921.76, 306,253.24 and 121,319.76

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Solution

The fourth proportional to 221,921.76, 306,253.24 and 121,319.76 is: 167,421.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,921.76 : 306,253.24 = 121,319.76 : x
  2. Step 2: Convert to fraction form
    221,921.76/306,253.24 = 121,319.76/x
  3. Step 3: Cross multiply
    221,921.76x = 306,253.24 × 121,319.76
  4. Step 4: Simplify right side
    221,921.76x = 37,154,569,576.02
  5. Step 5: Solve for x
    x = 37,154,569,576.02/221,921.76
  6. Step 6: Final answer
    x = 167,421.93

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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.