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Finding the Fourth Proportional to 221,602.74, 305,815.50 and 121,000.74

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Solution

The fourth proportional to 221,602.74, 305,815.50 and 121,000.74 is: 166,983.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,602.74 : 305,815.50 = 121,000.74 : x
  2. Step 2: Convert to fraction form
    221,602.74/305,815.50 = 121,000.74/x
  3. Step 3: Cross multiply
    221,602.74x = 305,815.50 × 121,000.74
  4. Step 4: Simplify right side
    221,602.74x = 37,003,901,803.47
  5. Step 5: Solve for x
    x = 37,003,901,803.47/221,602.74
  6. Step 6: Final answer
    x = 166,983.05

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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.