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Finding the Fourth Proportional to 115,885.03, 159,908.13 and 64,890.67

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Solution

The fourth proportional to 115,885.03, 159,908.13 and 64,890.67 is: 89,541.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,885.03 : 159,908.13 = 64,890.67 : x
  2. Step 2: Convert to fraction form
    115,885.03/159,908.13 = 64,890.67/x
  3. Step 3: Cross multiply
    115,885.03x = 159,908.13 × 64,890.67
  4. Step 4: Simplify right side
    115,885.03x = 10,376,545,694.15
  5. Step 5: Solve for x
    x = 10,376,545,694.15/115,885.03
  6. Step 6: Final answer
    x = 89,541.73

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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.