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Finding the Fourth Proportional to 207,911.88, 286,918.56 and 112,418.64

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Solution

The fourth proportional to 207,911.88, 286,918.56 and 112,418.64 is: 155,137.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,911.88 : 286,918.56 = 112,418.64 : x
  2. Step 2: Convert to fraction form
    207,911.88/286,918.56 = 112,418.64/x
  3. Step 3: Cross multiply
    207,911.88x = 286,918.56 × 112,418.64
  4. Step 4: Simplify right side
    207,911.88x = 32,254,994,305.96
  5. Step 5: Solve for x
    x = 32,254,994,305.96/207,911.88
  6. Step 6: Final answer
    x = 155,137.81

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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.