Home / 78,734.58-118,120.50-31,352.42

Finding the Fourth Proportional to 78,734.58, 118,120.50 and 31,352.42

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Solution

The fourth proportional to 78,734.58, 118,120.50 and 31,352.42 is: 47,036.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,734.58 : 118,120.50 = 31,352.42 : x
  2. Step 2: Convert to fraction form
    78,734.58/118,120.50 = 31,352.42/x
  3. Step 3: Cross multiply
    78,734.58x = 118,120.50 × 31,352.42
  4. Step 4: Simplify right side
    78,734.58x = 3,703,362,936.01
  5. Step 5: Solve for x
    x = 3,703,362,936.01/78,734.58
  6. Step 6: Final answer
    x = 47,036.04

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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.