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Finding the Fourth Proportional to 66,470.80, 99,463.20 and 48,974.80

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Solution

The fourth proportional to 66,470.80, 99,463.20 and 48,974.80 is: 73,283.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,470.80 : 99,463.20 = 48,974.80 : x
  2. Step 2: Convert to fraction form
    66,470.80/99,463.20 = 48,974.80/x
  3. Step 3: Cross multiply
    66,470.80x = 99,463.20 × 48,974.80
  4. Step 4: Simplify right side
    66,470.80x = 4,871,190,327.36
  5. Step 5: Solve for x
    x = 4,871,190,327.36/66,470.80
  6. Step 6: Final answer
    x = 73,283.16

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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.