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Finding the Fourth Proportional to 213,391.20, 320,053.20 and 134,263.20

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Solution

The fourth proportional to 213,391.20, 320,053.20 and 134,263.20 is: 201,373.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,391.20 : 320,053.20 = 134,263.20 : x
  2. Step 2: Convert to fraction form
    213,391.20/320,053.20 = 134,263.20/x
  3. Step 3: Cross multiply
    213,391.20x = 320,053.20 × 134,263.20
  4. Step 4: Simplify right side
    213,391.20x = 42,971,366,802.24
  5. Step 5: Solve for x
    x = 42,971,366,802.24/213,391.20
  6. Step 6: Final answer
    x = 201,373.66

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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.