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Finding the Fourth Proportional to 153,519.78, 211,872.89 and 85,547.82

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Solution

The fourth proportional to 153,519.78, 211,872.89 and 85,547.82 is: 118,064.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,519.78 : 211,872.89 = 85,547.82 : x
  2. Step 2: Convert to fraction form
    153,519.78/211,872.89 = 85,547.82/x
  3. Step 3: Cross multiply
    153,519.78x = 211,872.89 × 85,547.82
  4. Step 4: Simplify right side
    153,519.78x = 18,125,263,856.60
  5. Step 5: Solve for x
    x = 18,125,263,856.60/153,519.78
  6. Step 6: Final answer
    x = 118,064.68

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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.