Home / 78,780.20-118,256.70-43,701.80

Finding the Fourth Proportional to 78,780.20, 118,256.70 and 43,701.80

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Solution

The fourth proportional to 78,780.20, 118,256.70 and 43,701.80 is: 65,600.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,780.20 : 118,256.70 = 43,701.80 : x
  2. Step 2: Convert to fraction form
    78,780.20/118,256.70 = 43,701.80/x
  3. Step 3: Cross multiply
    78,780.20x = 118,256.70 × 43,701.80
  4. Step 4: Simplify right side
    78,780.20x = 5,168,030,652.06
  5. Step 5: Solve for x
    x = 5,168,030,652.06/78,780.20
  6. Step 6: Final answer
    x = 65,600.63

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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.