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Finding the Fourth Proportional to 215,940.61, 323,969.76 and 66,177.58

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Solution

The fourth proportional to 215,940.61, 323,969.76 and 66,177.58 is: 99,284.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,940.61 : 323,969.76 = 66,177.58 : x
  2. Step 2: Convert to fraction form
    215,940.61/323,969.76 = 66,177.58/x
  3. Step 3: Cross multiply
    215,940.61x = 323,969.76 × 66,177.58
  4. Step 4: Simplify right side
    215,940.61x = 21,439,533,090.13
  5. Step 5: Solve for x
    x = 21,439,533,090.13/215,940.61
  6. Step 6: Final answer
    x = 99,284.40

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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.