Home / 213,531.40-320,333.94-87,240.28

Finding the Fourth Proportional to 213,531.40, 320,333.94 and 87,240.28

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Solution

The fourth proportional to 213,531.40, 320,333.94 and 87,240.28 is: 130,875.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,531.40 : 320,333.94 = 87,240.28 : x
  2. Step 2: Convert to fraction form
    213,531.40/320,333.94 = 87,240.28/x
  3. Step 3: Cross multiply
    213,531.40x = 320,333.94 × 87,240.28
  4. Step 4: Simplify right side
    213,531.40x = 27,946,022,619.10
  5. Step 5: Solve for x
    x = 27,946,022,619.10/213,531.40
  6. Step 6: Final answer
    x = 130,875.47

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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.