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Finding the Fourth Proportional to 153,253.66, 211,499.55 and 85,285.78

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Solution

The fourth proportional to 153,253.66, 211,499.55 and 85,285.78 is: 117,699.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,253.66 : 211,499.55 = 85,285.78 : x
  2. Step 2: Convert to fraction form
    153,253.66/211,499.55 = 85,285.78/x
  3. Step 3: Cross multiply
    153,253.66x = 211,499.55 × 85,285.78
  4. Step 4: Simplify right side
    153,253.66x = 18,037,904,091.40
  5. Step 5: Solve for x
    x = 18,037,904,091.40/153,253.66
  6. Step 6: Final answer
    x = 117,699.66

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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.