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Finding the Fourth Proportional to 67,428.80, 100,970.40 and 49,803.20

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Solution

The fourth proportional to 67,428.80, 100,970.40 and 49,803.20 is: 74,577.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,428.80 : 100,970.40 = 49,803.20 : x
  2. Step 2: Convert to fraction form
    67,428.80/100,970.40 = 49,803.20/x
  3. Step 3: Cross multiply
    67,428.80x = 100,970.40 × 49,803.20
  4. Step 4: Simplify right side
    67,428.80x = 5,028,649,025.28
  5. Step 5: Solve for x
    x = 5,028,649,025.28/67,428.80
  6. Step 6: Final answer
    x = 74,577.17

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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.