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Finding the Fourth Proportional to 221,966.59, 306,315.08 and 121,364.59

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Solution

The fourth proportional to 221,966.59, 306,315.08 and 121,364.59 is: 167,483.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,966.59 : 306,315.08 = 121,364.59 : x
  2. Step 2: Convert to fraction form
    221,966.59/306,315.08 = 121,364.59/x
  3. Step 3: Cross multiply
    221,966.59x = 306,315.08 × 121,364.59
  4. Step 4: Simplify right side
    221,966.59x = 37,175,804,095.02
  5. Step 5: Solve for x
    x = 37,175,804,095.02/221,966.59
  6. Step 6: Final answer
    x = 167,483.78

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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.