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Finding the Fourth Proportional to 159,190.71, 219,679.61 and 87,569.16

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Solution

The fourth proportional to 159,190.71, 219,679.61 and 87,569.16 is: 120,843.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,190.71 : 219,679.61 = 87,569.16 : x
  2. Step 2: Convert to fraction form
    159,190.71/219,679.61 = 87,569.16/x
  3. Step 3: Cross multiply
    159,190.71x = 219,679.61 × 87,569.16
  4. Step 4: Simplify right side
    159,190.71x = 19,237,158,478.98
  5. Step 5: Solve for x
    x = 19,237,158,478.98/159,190.71
  6. Step 6: Final answer
    x = 120,843.47

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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.