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Finding the Fourth Proportional to 123,345.20, 185,104.20 and 79,079.60

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Solution

The fourth proportional to 123,345.20, 185,104.20 and 79,079.60 is: 118,674.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,345.20 : 185,104.20 = 79,079.60 : x
  2. Step 2: Convert to fraction form
    123,345.20/185,104.20 = 79,079.60/x
  3. Step 3: Cross multiply
    123,345.20x = 185,104.20 × 79,079.60
  4. Step 4: Simplify right side
    123,345.20x = 14,637,966,094.32
  5. Step 5: Solve for x
    x = 14,637,966,094.32/123,345.20
  6. Step 6: Final answer
    x = 118,674.79

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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.