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Finding the Fourth Proportional to 128,807.52, 193,235.04 and 40,055.28

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Solution

The fourth proportional to 128,807.52, 193,235.04 and 40,055.28 is: 60,090.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,807.52 : 193,235.04 = 40,055.28 : x
  2. Step 2: Convert to fraction form
    128,807.52/193,235.04 = 40,055.28/x
  3. Step 3: Cross multiply
    128,807.52x = 193,235.04 × 40,055.28
  4. Step 4: Simplify right side
    128,807.52x = 7,740,083,633.01
  5. Step 5: Solve for x
    x = 7,740,083,633.01/128,807.52
  6. Step 6: Final answer
    x = 60,090.31

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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.