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Finding the Fourth Proportional to 159,005.88, 219,432.78 and 87,386.49

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Solution

The fourth proportional to 159,005.88, 219,432.78 and 87,386.49 is: 120,595.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,005.88 : 219,432.78 = 87,386.49 : x
  2. Step 2: Convert to fraction form
    159,005.88/219,432.78 = 87,386.49/x
  3. Step 3: Cross multiply
    159,005.88x = 219,432.78 × 87,386.49
  4. Step 4: Simplify right side
    159,005.88x = 19,175,460,435.14
  5. Step 5: Solve for x
    x = 19,175,460,435.14/159,005.88
  6. Step 6: Final answer
    x = 120,595.92

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1.5x scale

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.