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Finding the Fourth Proportional to 153,374.13, 211,652.16 and 85,391.13

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Solution

The fourth proportional to 153,374.13, 211,652.16 and 85,391.13 is: 117,837.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,374.13 : 211,652.16 = 85,391.13 : x
  2. Step 2: Convert to fraction form
    153,374.13/211,652.16 = 85,391.13/x
  3. Step 3: Cross multiply
    153,374.13x = 211,652.16 × 85,391.13
  4. Step 4: Simplify right side
    153,374.13x = 18,073,217,109.34
  5. Step 5: Solve for x
    x = 18,073,217,109.34/153,374.13
  6. Step 6: Final answer
    x = 117,837.45

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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.