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Finding the Fourth Proportional to 99,813.60, 149,591.28 and 40,580.64

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Solution

The fourth proportional to 99,813.60, 149,591.28 and 40,580.64 is: 60,818.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,813.60 : 149,591.28 = 40,580.64 : x
  2. Step 2: Convert to fraction form
    99,813.60/149,591.28 = 40,580.64/x
  3. Step 3: Cross multiply
    99,813.60x = 149,591.28 × 40,580.64
  4. Step 4: Simplify right side
    99,813.60x = 6,070,509,880.82
  5. Step 5: Solve for x
    x = 6,070,509,880.82/99,813.60
  6. Step 6: Final answer
    x = 60,818.46

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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.