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Finding the Fourth Proportional to 135,007.92, 186,312.24 and 74,580

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Solution

The fourth proportional to 135,007.92, 186,312.24 and 74,580 is: 102,921.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,007.92 : 186,312.24 = 74,580 : x
  2. Step 2: Convert to fraction form
    135,007.92/186,312.24 = 74,580/x
  3. Step 3: Cross multiply
    135,007.92x = 186,312.24 × 74,580
  4. Step 4: Simplify right side
    135,007.92x = 13,895,166,859.20
  5. Step 5: Solve for x
    x = 13,895,166,859.20/135,007.92
  6. Step 6: Final answer
    x = 102,921.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.