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Finding the Fourth Proportional to 527,435.78, 791,142.73 and 128,078.64

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Solution

The fourth proportional to 527,435.78, 791,142.73 and 128,078.64 is: 192,115.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    527,435.78 : 791,142.73 = 128,078.64 : x
  2. Step 2: Convert to fraction form
    527,435.78/791,142.73 = 128,078.64/x
  3. Step 3: Cross multiply
    527,435.78x = 791,142.73 × 128,078.64
  4. Step 4: Simplify right side
    527,435.78x = 101,328,487,349.51
  5. Step 5: Solve for x
    x = 101,328,487,349.51/527,435.78
  6. Step 6: Final answer
    x = 192,115.31

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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.