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Finding the Fourth Proportional to 191,573.40, 287,360.10 and 66,898.20

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Solution

The fourth proportional to 191,573.40, 287,360.10 and 66,898.20 is: 100,347.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,573.40 : 287,360.10 = 66,898.20 : x
  2. Step 2: Convert to fraction form
    191,573.40/287,360.10 = 66,898.20/x
  3. Step 3: Cross multiply
    191,573.40x = 287,360.10 × 66,898.20
  4. Step 4: Simplify right side
    191,573.40x = 19,223,873,441.82
  5. Step 5: Solve for x
    x = 19,223,873,441.82/191,573.40
  6. Step 6: Final answer
    x = 100,347.30

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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.