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Finding the Fourth Proportional to 217,655, 300,364.98 and 127,073.78

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Solution

The fourth proportional to 217,655, 300,364.98 and 127,073.78 is: 175,362.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,655 : 300,364.98 = 127,073.78 : x
  2. Step 2: Convert to fraction form
    217,655/300,364.98 = 127,073.78/x
  3. Step 3: Cross multiply
    217,655x = 300,364.98 × 127,073.78
  4. Step 4: Simplify right side
    217,655x = 38,168,513,388.22
  5. Step 5: Solve for x
    x = 38,168,513,388.22/217,655
  6. Step 6: Final answer
    x = 175,362.45

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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.