Home / 78,734.40-118,111.20-28,806.72

Finding the Fourth Proportional to 78,734.40, 118,111.20 and 28,806.72

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Solution

The fourth proportional to 78,734.40, 118,111.20 and 28,806.72 is: 43,213.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,734.40 : 118,111.20 = 28,806.72 : x
  2. Step 2: Convert to fraction form
    78,734.40/118,111.20 = 28,806.72/x
  3. Step 3: Cross multiply
    78,734.40x = 118,111.20 × 28,806.72
  4. Step 4: Simplify right side
    78,734.40x = 3,402,396,267.26
  5. Step 5: Solve for x
    x = 3,402,396,267.26/78,734.40
  6. Step 6: Final answer
    x = 43,213.59

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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.