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Finding the Fourth Proportional to 239,391.21, 330,359.72 and 130,495.76

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Solution

The fourth proportional to 239,391.21, 330,359.72 and 130,495.76 is: 180,084.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,391.21 : 330,359.72 = 130,495.76 : x
  2. Step 2: Convert to fraction form
    239,391.21/330,359.72 = 130,495.76/x
  3. Step 3: Cross multiply
    239,391.21x = 330,359.72 × 130,495.76
  4. Step 4: Simplify right side
    239,391.21x = 43,110,540,430.51
  5. Step 5: Solve for x
    x = 43,110,540,430.51/239,391.21
  6. Step 6: Final answer
    x = 180,084.06

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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.