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Finding the Fourth Proportional to 103,483.56, 155,333.90 and 91,712.64

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Solution

The fourth proportional to 103,483.56, 155,333.90 and 91,712.64 is: 137,665.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,483.56 : 155,333.90 = 91,712.64 : x
  2. Step 2: Convert to fraction form
    103,483.56/155,333.90 = 91,712.64/x
  3. Step 3: Cross multiply
    103,483.56x = 155,333.90 × 91,712.64
  4. Step 4: Simplify right side
    103,483.56x = 14,246,081,591.93
  5. Step 5: Solve for x
    x = 14,246,081,591.93/103,483.56
  6. Step 6: Final answer
    x = 137,665.17

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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.