Home / 136,904.50-188,928.21-77,288.50

Finding the Fourth Proportional to 136,904.50, 188,928.21 and 77,288.50

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Solution

The fourth proportional to 136,904.50, 188,928.21 and 77,288.50 is: 106,658.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,904.50 : 188,928.21 = 77,288.50 : x
  2. Step 2: Convert to fraction form
    136,904.50/188,928.21 = 77,288.50/x
  3. Step 3: Cross multiply
    136,904.50x = 188,928.21 × 77,288.50
  4. Step 4: Simplify right side
    136,904.50x = 14,601,977,958.59
  5. Step 5: Solve for x
    x = 14,601,977,958.59/136,904.50
  6. Step 6: Final answer
    x = 106,658.13

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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.