Home / 81,503.02-122,289.60-39,414.76

Finding the Fourth Proportional to 81,503.02, 122,289.60 and 39,414.76

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Solution

The fourth proportional to 81,503.02, 122,289.60 and 39,414.76 is: 59,139.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,503.02 : 122,289.60 = 39,414.76 : x
  2. Step 2: Convert to fraction form
    81,503.02/122,289.60 = 39,414.76/x
  3. Step 3: Cross multiply
    81,503.02x = 122,289.60 × 39,414.76
  4. Step 4: Simplify right side
    81,503.02x = 4,820,015,234.50
  5. Step 5: Solve for x
    x = 4,820,015,234.50/81,503.02
  6. Step 6: Final answer
    x = 59,139.10

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1.5x scale

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.