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Finding the Fourth Proportional to 139,885.50, 193,042.08 and 76,223.28

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Solution

The fourth proportional to 139,885.50, 193,042.08 and 76,223.28 is: 105,188.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,885.50 : 193,042.08 = 76,223.28 : x
  2. Step 2: Convert to fraction form
    139,885.50/193,042.08 = 76,223.28/x
  3. Step 3: Cross multiply
    139,885.50x = 193,042.08 × 76,223.28
  4. Step 4: Simplify right side
    139,885.50x = 14,714,300,515.62
  5. Step 5: Solve for x
    x = 14,714,300,515.62/139,885.50
  6. Step 6: Final answer
    x = 105,188.18

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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.