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Finding the Fourth Proportional to 153,490.03, 211,813.05 and 85,506.91

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Solution

The fourth proportional to 153,490.03, 211,813.05 and 85,506.91 is: 117,997.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,490.03 : 211,813.05 = 85,506.91 : x
  2. Step 2: Convert to fraction form
    153,490.03/211,813.05 = 85,506.91/x
  3. Step 3: Cross multiply
    153,490.03x = 211,813.05 × 85,506.91
  4. Step 4: Simplify right side
    153,490.03x = 18,111,479,403.18
  5. Step 5: Solve for x
    x = 18,111,479,403.18/153,490.03
  6. Step 6: Final answer
    x = 117,997.76

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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.