Home / 103,913.40-156,023.70-80,566.20

Finding the Fourth Proportional to 103,913.40, 156,023.70 and 80,566.20

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Solution

The fourth proportional to 103,913.40, 156,023.70 and 80,566.20 is: 120,968.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,913.40 : 156,023.70 = 80,566.20 : x
  2. Step 2: Convert to fraction form
    103,913.40/156,023.70 = 80,566.20/x
  3. Step 3: Cross multiply
    103,913.40x = 156,023.70 × 80,566.20
  4. Step 4: Simplify right side
    103,913.40x = 12,570,236,618.94
  5. Step 5: Solve for x
    x = 12,570,236,618.94/103,913.40
  6. Step 6: Final answer
    x = 120,968.39

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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.