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Finding the Fourth Proportional to 128,034.04, 191,918.06 and 53,194.90

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Solution

The fourth proportional to 128,034.04, 191,918.06 and 53,194.90 is: 79,737.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,034.04 : 191,918.06 = 53,194.90 : x
  2. Step 2: Convert to fraction form
    128,034.04/191,918.06 = 53,194.90/x
  3. Step 3: Cross multiply
    128,034.04x = 191,918.06 × 53,194.90
  4. Step 4: Simplify right side
    128,034.04x = 10,209,062,009.89
  5. Step 5: Solve for x
    x = 10,209,062,009.89/128,034.04
  6. Step 6: Final answer
    x = 79,737.09

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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.