Home / 78,815.40-118,223.10-49,290.90

Finding the Fourth Proportional to 78,815.40, 118,223.10 and 49,290.90

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Solution

The fourth proportional to 78,815.40, 118,223.10 and 49,290.90 is: 73,936.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,815.40 : 118,223.10 = 49,290.90 : x
  2. Step 2: Convert to fraction form
    78,815.40/118,223.10 = 49,290.90/x
  3. Step 3: Cross multiply
    78,815.40x = 118,223.10 × 49,290.90
  4. Step 4: Simplify right side
    78,815.40x = 5,827,322,999.79
  5. Step 5: Solve for x
    x = 5,827,322,999.79/78,815.40
  6. Step 6: Final answer
    x = 73,936.35

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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.