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Finding the Fourth Proportional to 88,913.30, 133,041.90 and 81,040.10

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Solution

The fourth proportional to 88,913.30, 133,041.90 and 81,040.10 is: 121,261.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,913.30 : 133,041.90 = 81,040.10 : x
  2. Step 2: Convert to fraction form
    88,913.30/133,041.90 = 81,040.10/x
  3. Step 3: Cross multiply
    88,913.30x = 133,041.90 × 81,040.10
  4. Step 4: Simplify right side
    88,913.30x = 10,781,728,880.19
  5. Step 5: Solve for x
    x = 10,781,728,880.19/88,913.30
  6. Step 6: Final answer
    x = 121,261.15

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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.