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Finding the Fourth Proportional to 217,387.50, 299,994.76 and 121,894.20

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Solution

The fourth proportional to 217,387.50, 299,994.76 and 121,894.20 is: 168,214.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,387.50 : 299,994.76 = 121,894.20 : x
  2. Step 2: Convert to fraction form
    217,387.50/299,994.76 = 121,894.20/x
  3. Step 3: Cross multiply
    217,387.50x = 299,994.76 × 121,894.20
  4. Step 4: Simplify right side
    217,387.50x = 36,567,621,274.39
  5. Step 5: Solve for x
    x = 36,567,621,274.39/217,387.50
  6. Step 6: Final answer
    x = 168,214.00

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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.