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Finding the Fourth Proportional to 215,897.36, 323,867.64 and 66,135.92

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Solution

The fourth proportional to 215,897.36, 323,867.64 and 66,135.92 is: 99,210.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,897.36 : 323,867.64 = 66,135.92 : x
  2. Step 2: Convert to fraction form
    215,897.36/323,867.64 = 66,135.92/x
  3. Step 3: Cross multiply
    215,897.36x = 323,867.64 × 66,135.92
  4. Step 4: Simplify right side
    215,897.36x = 21,419,284,329.63
  5. Step 5: Solve for x
    x = 21,419,284,329.63/215,897.36
  6. Step 6: Final answer
    x = 99,210.50

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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.