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Finding the Fourth Proportional to 217,859.84, 300,640.59 and 121,061.21

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Solution

The fourth proportional to 217,859.84, 300,640.59 and 121,061.21 is: 167,061.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,859.84 : 300,640.59 = 121,061.21 : x
  2. Step 2: Convert to fraction form
    217,859.84/300,640.59 = 121,061.21/x
  3. Step 3: Cross multiply
    217,859.84x = 300,640.59 × 121,061.21
  4. Step 4: Simplify right side
    217,859.84x = 36,395,913,600.51
  5. Step 5: Solve for x
    x = 36,395,913,600.51/217,859.84
  6. Step 6: Final answer
    x = 167,061.14

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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.