Home / 78,778.64-118,220.48-40,862.86

Finding the Fourth Proportional to 78,778.64, 118,220.48 and 40,862.86

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Solution

The fourth proportional to 78,778.64, 118,220.48 and 40,862.86 is: 61,321.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,778.64 : 118,220.48 = 40,862.86 : x
  2. Step 2: Convert to fraction form
    78,778.64/118,220.48 = 40,862.86/x
  3. Step 3: Cross multiply
    78,778.64x = 118,220.48 × 40,862.86
  4. Step 4: Simplify right side
    78,778.64x = 4,830,826,923.37
  5. Step 5: Solve for x
    x = 4,830,826,923.37/78,778.64
  6. Step 6: Final answer
    x = 61,321.53

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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.