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Finding the Fourth Proportional to 102,881.80, 154,322.70 and 91,728.10

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Solution

The fourth proportional to 102,881.80, 154,322.70 and 91,728.10 is: 137,592.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,881.80 : 154,322.70 = 91,728.10 : x
  2. Step 2: Convert to fraction form
    102,881.80/154,322.70 = 91,728.10/x
  3. Step 3: Cross multiply
    102,881.80x = 154,322.70 × 91,728.10
  4. Step 4: Simplify right side
    102,881.80x = 14,155,728,057.87
  5. Step 5: Solve for x
    x = 14,155,728,057.87/102,881.80
  6. Step 6: Final answer
    x = 137,592.15

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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.