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Finding the Fourth Proportional to 145,342.40, 218,042.40 and 122,129.60

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Solution

The fourth proportional to 145,342.40, 218,042.40 and 122,129.60 is: 183,218.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,342.40 : 218,042.40 = 122,129.60 : x
  2. Step 2: Convert to fraction form
    145,342.40/218,042.40 = 122,129.60/x
  3. Step 3: Cross multiply
    145,342.40x = 218,042.40 × 122,129.60
  4. Step 4: Simplify right side
    145,342.40x = 26,629,431,095.04
  5. Step 5: Solve for x
    x = 26,629,431,095.04/145,342.40
  6. Step 6: Final answer
    x = 183,218.60

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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.