Home / 136,332.48-188,090.12-78,940.47

Finding the Fourth Proportional to 136,332.48, 188,090.12 and 78,940.47

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Solution

The fourth proportional to 136,332.48, 188,090.12 and 78,940.47 is: 108,909.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,332.48 : 188,090.12 = 78,940.47 : x
  2. Step 2: Convert to fraction form
    136,332.48/188,090.12 = 78,940.47/x
  3. Step 3: Cross multiply
    136,332.48x = 188,090.12 × 78,940.47
  4. Step 4: Simplify right side
    136,332.48x = 14,847,922,376.48
  5. Step 5: Solve for x
    x = 14,847,922,376.48/136,332.48
  6. Step 6: Final answer
    x = 108,909.65

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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.