Home / 221,129.47-331,764.37-78,971.74

Finding the Fourth Proportional to 221,129.47, 331,764.37 and 78,971.74

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Solution

The fourth proportional to 221,129.47, 331,764.37 and 78,971.74 is: 118,482.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,129.47 : 331,764.37 = 78,971.74 : x
  2. Step 2: Convert to fraction form
    221,129.47/331,764.37 = 78,971.74/x
  3. Step 3: Cross multiply
    221,129.47x = 331,764.37 × 78,971.74
  4. Step 4: Simplify right side
    221,129.47x = 26,200,009,568.90
  5. Step 5: Solve for x
    x = 26,200,009,568.90/221,129.47
  6. Step 6: Final answer
    x = 118,482.67

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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.