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Finding the Fourth Proportional to 217,320.40, 325,721.40 and 112,085.20

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Solution

The fourth proportional to 217,320.40, 325,721.40 and 112,085.20 is: 167,994.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,320.40 : 325,721.40 = 112,085.20 : x
  2. Step 2: Convert to fraction form
    217,320.40/325,721.40 = 112,085.20/x
  3. Step 3: Cross multiply
    217,320.40x = 325,721.40 × 112,085.20
  4. Step 4: Simplify right side
    217,320.40x = 36,508,548,263.28
  5. Step 5: Solve for x
    x = 36,508,548,263.28/217,320.40
  6. Step 6: Final answer
    x = 167,994.11

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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.