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Finding the Fourth Proportional to 313,513.97, 470,122.80 and 121,478.36

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Solution

The fourth proportional to 313,513.97, 470,122.80 and 121,478.36 is: 182,160.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,513.97 : 470,122.80 = 121,478.36 : x
  2. Step 2: Convert to fraction form
    313,513.97/470,122.80 = 121,478.36/x
  3. Step 3: Cross multiply
    313,513.97x = 470,122.80 × 121,478.36
  4. Step 4: Simplify right side
    313,513.97x = 57,109,746,742.61
  5. Step 5: Solve for x
    x = 57,109,746,742.61/313,513.97
  6. Step 6: Final answer
    x = 182,160.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.