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Finding the Fourth Proportional to 207,878.90, 286,872.90 and 112,385.57

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Solution

The fourth proportional to 207,878.90, 286,872.90 and 112,385.57 is: 155,092.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,878.90 : 286,872.90 = 112,385.57 : x
  2. Step 2: Convert to fraction form
    207,878.90/286,872.90 = 112,385.57/x
  3. Step 3: Cross multiply
    207,878.90x = 286,872.90 × 112,385.57
  4. Step 4: Simplify right side
    207,878.90x = 32,240,372,949.69
  5. Step 5: Solve for x
    x = 32,240,372,949.69/207,878.90
  6. Step 6: Final answer
    x = 155,092.09

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1.5x scale

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.