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Finding the Fourth Proportional to 153,752.36, 212,069.22 and 99,938.12

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Solution

The fourth proportional to 153,752.36, 212,069.22 and 99,938.12 is: 137,843.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,752.36 : 212,069.22 = 99,938.12 : x
  2. Step 2: Convert to fraction form
    153,752.36/212,069.22 = 99,938.12/x
  3. Step 3: Cross multiply
    153,752.36x = 212,069.22 × 99,938.12
  4. Step 4: Simplify right side
    153,752.36x = 21,193,799,156.67
  5. Step 5: Solve for x
    x = 21,193,799,156.67/153,752.36
  6. Step 6: Final answer
    x = 137,843.73

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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.