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Finding the Fourth Proportional to 217,875.76, 300,621.90 and 127,190.56

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Solution

The fourth proportional to 217,875.76, 300,621.90 and 127,190.56 is: 175,495.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,875.76 : 300,621.90 = 127,190.56 : x
  2. Step 2: Convert to fraction form
    217,875.76/300,621.90 = 127,190.56/x
  3. Step 3: Cross multiply
    217,875.76x = 300,621.90 × 127,190.56
  4. Step 4: Simplify right side
    217,875.76x = 38,236,267,809.26
  5. Step 5: Solve for x
    x = 38,236,267,809.26/217,875.76
  6. Step 6: Final answer
    x = 175,495.74

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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.