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Finding the Fourth Proportional to 217,970.78, 300,835.80 and 127,326.47

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Solution

The fourth proportional to 217,970.78, 300,835.80 and 127,326.47 is: 175,731.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,970.78 : 300,835.80 = 127,326.47 : x
  2. Step 2: Convert to fraction form
    217,970.78/300,835.80 = 127,326.47/x
  3. Step 3: Cross multiply
    217,970.78x = 300,835.80 × 127,326.47
  4. Step 4: Simplify right side
    217,970.78x = 38,304,358,959.45
  5. Step 5: Solve for x
    x = 38,304,358,959.45/217,970.78
  6. Step 6: Final answer
    x = 175,731.63

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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.