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Finding the Fourth Proportional to 208,337.40, 312,506.10 and 68,110.20

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Solution

The fourth proportional to 208,337.40, 312,506.10 and 68,110.20 is: 102,165.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,337.40 : 312,506.10 = 68,110.20 : x
  2. Step 2: Convert to fraction form
    208,337.40/312,506.10 = 68,110.20/x
  3. Step 3: Cross multiply
    208,337.40x = 312,506.10 × 68,110.20
  4. Step 4: Simplify right side
    208,337.40x = 21,284,852,972.22
  5. Step 5: Solve for x
    x = 21,284,852,972.22/208,337.40
  6. Step 6: Final answer
    x = 102,165.30

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1.5x scale

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.