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Finding the Fourth Proportional to 192,130.69, 288,189.88 and 86,949.66

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Solution

The fourth proportional to 192,130.69, 288,189.88 and 86,949.66 is: 130,421.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,130.69 : 288,189.88 = 86,949.66 : x
  2. Step 2: Convert to fraction form
    192,130.69/288,189.88 = 86,949.66/x
  3. Step 3: Cross multiply
    192,130.69x = 288,189.88 × 86,949.66
  4. Step 4: Simplify right side
    192,130.69x = 25,058,012,081.44
  5. Step 5: Solve for x
    x = 25,058,012,081.44/192,130.69
  6. Step 6: Final answer
    x = 130,421.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.