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Finding the Fourth Proportional to 139,445.42, 192,435.88 and 75,783.18

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Solution

The fourth proportional to 139,445.42, 192,435.88 and 75,783.18 is: 104,581.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,445.42 : 192,435.88 = 75,783.18 : x
  2. Step 2: Convert to fraction form
    139,445.42/192,435.88 = 75,783.18/x
  3. Step 3: Cross multiply
    139,445.42x = 192,435.88 × 75,783.18
  4. Step 4: Simplify right side
    139,445.42x = 14,583,402,932.50
  5. Step 5: Solve for x
    x = 14,583,402,932.50/139,445.42
  6. Step 6: Final answer
    x = 104,581.44

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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.