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Finding the Fourth Proportional to 115,787.90, 159,790.15 and 64,800.22

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Solution

The fourth proportional to 115,787.90, 159,790.15 and 64,800.22 is: 89,425.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,787.90 : 159,790.15 = 64,800.22 : x
  2. Step 2: Convert to fraction form
    115,787.90/159,790.15 = 64,800.22/x
  3. Step 3: Cross multiply
    115,787.90x = 159,790.15 × 64,800.22
  4. Step 4: Simplify right side
    115,787.90x = 10,354,436,074.88
  5. Step 5: Solve for x
    x = 10,354,436,074.88/115,787.90
  6. Step 6: Final answer
    x = 89,425.89

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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.