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Finding the Fourth Proportional to 116,590.40, 160,890 and 68,859.20

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Solution

The fourth proportional to 116,590.40, 160,890 and 68,859.20 is: 95,022.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,590.40 : 160,890 = 68,859.20 : x
  2. Step 2: Convert to fraction form
    116,590.40/160,890 = 68,859.20/x
  3. Step 3: Cross multiply
    116,590.40x = 160,890 × 68,859.20
  4. Step 4: Simplify right side
    116,590.40x = 11,078,756,688
  5. Step 5: Solve for x
    x = 11,078,756,688/116,590.40
  6. Step 6: Final answer
    x = 95,022.89

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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.