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Finding the Fourth Proportional to 153,411.12, 211,704.84 and 86,343.12

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Solution

The fourth proportional to 153,411.12, 211,704.84 and 86,343.12 is: 119,152.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,411.12 : 211,704.84 = 86,343.12 : x
  2. Step 2: Convert to fraction form
    153,411.12/211,704.84 = 86,343.12/x
  3. Step 3: Cross multiply
    153,411.12x = 211,704.84 × 86,343.12
  4. Step 4: Simplify right side
    153,411.12x = 18,279,256,404.70
  5. Step 5: Solve for x
    x = 18,279,256,404.70/153,411.12
  6. Step 6: Final answer
    x = 119,152.10

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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.