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Finding the Fourth Proportional to 153,005.60, 211,143.50 and 85,020.81

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Solution

The fourth proportional to 153,005.60, 211,143.50 and 85,020.81 is: 117,326.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,005.60 : 211,143.50 = 85,020.81 : x
  2. Step 2: Convert to fraction form
    153,005.60/211,143.50 = 85,020.81/x
  3. Step 3: Cross multiply
    153,005.60x = 211,143.50 × 85,020.81
  4. Step 4: Simplify right side
    153,005.60x = 17,951,590,971.13
  5. Step 5: Solve for x
    x = 17,951,590,971.13/153,005.60
  6. Step 6: Final answer
    x = 117,326.37

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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.