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Finding the Fourth Proportional to 123,661.60, 185,384.40 and 84,090.40

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Solution

The fourth proportional to 123,661.60, 185,384.40 and 84,090.40 is: 126,062.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,661.60 : 185,384.40 = 84,090.40 : x
  2. Step 2: Convert to fraction form
    123,661.60/185,384.40 = 84,090.40/x
  3. Step 3: Cross multiply
    123,661.60x = 185,384.40 × 84,090.40
  4. Step 4: Simplify right side
    123,661.60x = 15,589,048,349.76
  5. Step 5: Solve for x
    x = 15,589,048,349.76/123,661.60
  6. Step 6: Final answer
    x = 126,062.16

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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.