Home / 155,811.18-214,967.84-87,819.78

Finding the Fourth Proportional to 155,811.18, 214,967.84 and 87,819.78

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Solution

The fourth proportional to 155,811.18, 214,967.84 and 87,819.78 is: 121,162.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,811.18 : 214,967.84 = 87,819.78 : x
  2. Step 2: Convert to fraction form
    155,811.18/214,967.84 = 87,819.78/x
  3. Step 3: Cross multiply
    155,811.18x = 214,967.84 × 87,819.78
  4. Step 4: Simplify right side
    155,811.18x = 18,878,428,415.88
  5. Step 5: Solve for x
    x = 18,878,428,415.88/155,811.18
  6. Step 6: Final answer
    x = 121,162.22

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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.