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Finding the Fourth Proportional to 139,783.32, 192,909.08 and 105,266.25

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Solution

The fourth proportional to 139,783.32, 192,909.08 and 105,266.25 is: 145,273.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,783.32 : 192,909.08 = 105,266.25 : x
  2. Step 2: Convert to fraction form
    139,783.32/192,909.08 = 105,266.25/x
  3. Step 3: Cross multiply
    139,783.32x = 192,909.08 × 105,266.25
  4. Step 4: Simplify right side
    139,783.32x = 20,306,815,442.55
  5. Step 5: Solve for x
    x = 20,306,815,442.55/139,783.32
  6. Step 6: Final answer
    x = 145,273.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.