Home / 136,739.25-188,709.63-76,321.65

Finding the Fourth Proportional to 136,739.25, 188,709.63 and 76,321.65

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Solution

The fourth proportional to 136,739.25, 188,709.63 and 76,321.65 is: 105,329.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,739.25 : 188,709.63 = 76,321.65 : x
  2. Step 2: Convert to fraction form
    136,739.25/188,709.63 = 76,321.65/x
  3. Step 3: Cross multiply
    136,739.25x = 188,709.63 × 76,321.65
  4. Step 4: Simplify right side
    136,739.25x = 14,402,630,332.49
  5. Step 5: Solve for x
    x = 14,402,630,332.49/136,739.25
  6. Step 6: Final answer
    x = 105,329.16

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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.