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Finding the Fourth Proportional to 122,487.40, 183,731.10 and 104,991.40

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Solution

The fourth proportional to 122,487.40, 183,731.10 and 104,991.40 is: 157,487.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,487.40 : 183,731.10 = 104,991.40 : x
  2. Step 2: Convert to fraction form
    122,487.40/183,731.10 = 104,991.40/x
  3. Step 3: Cross multiply
    122,487.40x = 183,731.10 × 104,991.40
  4. Step 4: Simplify right side
    122,487.40x = 19,290,185,412.54
  5. Step 5: Solve for x
    x = 19,290,185,412.54/122,487.40
  6. Step 6: Final answer
    x = 157,487.10

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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.