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Finding the Fourth Proportional to 66,560.36, 99,867.72 and 42,880.28

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Solution

The fourth proportional to 66,560.36, 99,867.72 and 42,880.28 is: 64,337.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,560.36 : 99,867.72 = 42,880.28 : x
  2. Step 2: Convert to fraction form
    66,560.36/99,867.72 = 42,880.28/x
  3. Step 3: Cross multiply
    66,560.36x = 99,867.72 × 42,880.28
  4. Step 4: Simplify right side
    66,560.36x = 4,282,355,796.56
  5. Step 5: Solve for x
    x = 4,282,355,796.56/66,560.36
  6. Step 6: Final answer
    x = 64,337.93

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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.