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Finding the Fourth Proportional to 115,690.59, 159,605.91 and 75,389.67

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Solution

The fourth proportional to 115,690.59, 159,605.91 and 75,389.67 is: 104,007.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,690.59 : 159,605.91 = 75,389.67 : x
  2. Step 2: Convert to fraction form
    115,690.59/159,605.91 = 75,389.67/x
  3. Step 3: Cross multiply
    115,690.59x = 159,605.91 × 75,389.67
  4. Step 4: Simplify right side
    115,690.59x = 12,032,636,884.95
  5. Step 5: Solve for x
    x = 12,032,636,884.95/115,690.59
  6. Step 6: Final answer
    x = 104,007.05

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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.