Home / 135,128.99-186,469.10-77,759.04

Finding the Fourth Proportional to 135,128.99, 186,469.10 and 77,759.04

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Solution

The fourth proportional to 135,128.99, 186,469.10 and 77,759.04 is: 107,302.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,128.99 : 186,469.10 = 77,759.04 : x
  2. Step 2: Convert to fraction form
    135,128.99/186,469.10 = 77,759.04/x
  3. Step 3: Cross multiply
    135,128.99x = 186,469.10 × 77,759.04
  4. Step 4: Simplify right side
    135,128.99x = 14,499,657,816.87
  5. Step 5: Solve for x
    x = 14,499,657,816.87/135,128.99
  6. Step 6: Final answer
    x = 107,302.35

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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.