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Finding the Fourth Proportional to 171,347.40, 256,905.90 and 91,398.60

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Solution

The fourth proportional to 171,347.40, 256,905.90 and 91,398.60 is: 137,036.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,347.40 : 256,905.90 = 91,398.60 : x
  2. Step 2: Convert to fraction form
    171,347.40/256,905.90 = 91,398.60/x
  3. Step 3: Cross multiply
    171,347.40x = 256,905.90 × 91,398.60
  4. Step 4: Simplify right side
    171,347.40x = 23,480,839,591.74
  5. Step 5: Solve for x
    x = 23,480,839,591.74/171,347.40
  6. Step 6: Final answer
    x = 137,036.45

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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.