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Finding the Fourth Proportional to 217,912.77, 300,666.74 and 127,216.80

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Solution

The fourth proportional to 217,912.77, 300,666.74 and 127,216.80 is: 175,528.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,912.77 : 300,666.74 = 127,216.80 : x
  2. Step 2: Convert to fraction form
    217,912.77/300,666.74 = 127,216.80/x
  3. Step 3: Cross multiply
    217,912.77x = 300,666.74 × 127,216.80
  4. Step 4: Simplify right side
    217,912.77x = 38,249,859,893.15
  5. Step 5: Solve for x
    x = 38,249,859,893.15/217,912.77
  6. Step 6: Final answer
    x = 175,528.31

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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.