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Finding the Fourth Proportional to 153,963.20, 215,023.60 and 153,963.20

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Solution

The fourth proportional to 153,963.20, 215,023.60 and 153,963.20 is: 215,023.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,963.20 : 215,023.60 = 153,963.20 : x
  2. Step 2: Convert to fraction form
    153,963.20/215,023.60 = 153,963.20/x
  3. Step 3: Cross multiply
    153,963.20x = 215,023.60 × 153,963.20
  4. Step 4: Simplify right side
    153,963.20x = 33,105,721,531.52
  5. Step 5: Solve for x
    x = 33,105,721,531.52/153,963.20
  6. Step 6: Final answer
    x = 215,023.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.