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Finding the Fourth Proportional to 158,963.84, 219,370.56 and 87,345.28

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Solution

The fourth proportional to 158,963.84, 219,370.56 and 87,345.28 is: 120,536.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,963.84 : 219,370.56 = 87,345.28 : x
  2. Step 2: Convert to fraction form
    158,963.84/219,370.56 = 87,345.28/x
  3. Step 3: Cross multiply
    158,963.84x = 219,370.56 × 87,345.28
  4. Step 4: Simplify right side
    158,963.84x = 19,160,982,986.96
  5. Step 5: Solve for x
    x = 19,160,982,986.96/158,963.84
  6. Step 6: Final answer
    x = 120,536.74

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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.