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Finding the Fourth Proportional to 494,063.80, 741,128.10 and 139,089.40

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Solution

The fourth proportional to 494,063.80, 741,128.10 and 139,089.40 is: 208,643.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,063.80 : 741,128.10 = 139,089.40 : x
  2. Step 2: Convert to fraction form
    494,063.80/741,128.10 = 139,089.40/x
  3. Step 3: Cross multiply
    494,063.80x = 741,128.10 × 139,089.40
  4. Step 4: Simplify right side
    494,063.80x = 103,083,062,752.14
  5. Step 5: Solve for x
    x = 103,083,062,752.14/494,063.80
  6. Step 6: Final answer
    x = 208,643.22

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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.