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Finding the Fourth Proportional to 221,809.98, 306,098.55 and 121,210.14

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Solution

The fourth proportional to 221,809.98, 306,098.55 and 121,210.14 is: 167,270.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,809.98 : 306,098.55 = 121,210.14 : x
  2. Step 2: Convert to fraction form
    221,809.98/306,098.55 = 121,210.14/x
  3. Step 3: Cross multiply
    221,809.98x = 306,098.55 × 121,210.14
  4. Step 4: Simplify right side
    221,809.98x = 37,102,248,099.30
  5. Step 5: Solve for x
    x = 37,102,248,099.30/221,809.98
  6. Step 6: Final answer
    x = 167,270.42

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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.