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Finding the Fourth Proportional to 74,549.62, 102,880.83 and 42,728.50

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Solution

The fourth proportional to 74,549.62, 102,880.83 and 42,728.50 is: 58,966.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,549.62 : 102,880.83 = 42,728.50 : x
  2. Step 2: Convert to fraction form
    74,549.62/102,880.83 = 42,728.50/x
  3. Step 3: Cross multiply
    74,549.62x = 102,880.83 × 42,728.50
  4. Step 4: Simplify right side
    74,549.62x = 4,395,943,544.66
  5. Step 5: Solve for x
    x = 4,395,943,544.66/74,549.62
  6. Step 6: Final answer
    x = 58,966.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.