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Finding the Fourth Proportional to 191,498.40, 287,378.80 and 66,839.40

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Solution

The fourth proportional to 191,498.40, 287,378.80 and 66,839.40 is: 100,304.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,498.40 : 287,378.80 = 66,839.40 : x
  2. Step 2: Convert to fraction form
    191,498.40/287,378.80 = 66,839.40/x
  3. Step 3: Cross multiply
    191,498.40x = 287,378.80 × 66,839.40
  4. Step 4: Simplify right side
    191,498.40x = 19,208,226,564.72
  5. Step 5: Solve for x
    x = 19,208,226,564.72/191,498.40
  6. Step 6: Final answer
    x = 100,304.89

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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.