Home / 141,320.45-212,053.37-78,128.84

Finding the Fourth Proportional to 141,320.45, 212,053.37 and 78,128.84

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Solution

The fourth proportional to 141,320.45, 212,053.37 and 78,128.84 is: 117,233.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,320.45 : 212,053.37 = 78,128.84 : x
  2. Step 2: Convert to fraction form
    141,320.45/212,053.37 = 78,128.84/x
  3. Step 3: Cross multiply
    141,320.45x = 212,053.37 × 78,128.84
  4. Step 4: Simplify right side
    141,320.45x = 16,567,482,365.28
  5. Step 5: Solve for x
    x = 16,567,482,365.28/141,320.45
  6. Step 6: Final answer
    x = 117,233.44

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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.