Home / 78,708.56-118,019.09-31,906.76

Finding the Fourth Proportional to 78,708.56, 118,019.09 and 31,906.76

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Solution

The fourth proportional to 78,708.56, 118,019.09 and 31,906.76 is: 47,842.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,708.56 : 118,019.09 = 31,906.76 : x
  2. Step 2: Convert to fraction form
    78,708.56/118,019.09 = 31,906.76/x
  3. Step 3: Cross multiply
    78,708.56x = 118,019.09 × 31,906.76
  4. Step 4: Simplify right side
    78,708.56x = 3,765,606,030.42
  5. Step 5: Solve for x
    x = 3,765,606,030.42/78,708.56
  6. Step 6: Final answer
    x = 47,842.40

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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.