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Finding the Fourth Proportional to 367,670.45, 551,381.65 and 139,912.00

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Solution

The fourth proportional to 367,670.45, 551,381.65 and 139,912.00 is: 209,820.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    367,670.45 : 551,381.65 = 139,912.00 : x
  2. Step 2: Convert to fraction form
    367,670.45/551,381.65 = 139,912.00/x
  3. Step 3: Cross multiply
    367,670.45x = 551,381.65 × 139,912.00
  4. Step 4: Simplify right side
    367,670.45x = 77,144,907,686.57
  5. Step 5: Solve for x
    x = 77,144,907,686.57/367,670.45
  6. Step 6: Final answer
    x = 209,820.80

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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.