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Finding the Fourth Proportional to 208,710.90, 313,090.92 and 66,506.76

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Solution

The fourth proportional to 208,710.90, 313,090.92 and 66,506.76 is: 99,767.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,710.90 : 313,090.92 = 66,506.76 : x
  2. Step 2: Convert to fraction form
    208,710.90/313,090.92 = 66,506.76/x
  3. Step 3: Cross multiply
    208,710.90x = 313,090.92 × 66,506.76
  4. Step 4: Simplify right side
    208,710.90x = 20,822,662,674.62
  5. Step 5: Solve for x
    x = 20,822,662,674.62/208,710.90
  6. Step 6: Final answer
    x = 99,767.97

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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.