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Finding the Fourth Proportional to 153,863.51, 212,342.34 and 85,893.75

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Solution

The fourth proportional to 153,863.51, 212,342.34 and 85,893.75 is: 118,539.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,863.51 : 212,342.34 = 85,893.75 : x
  2. Step 2: Convert to fraction form
    153,863.51/212,342.34 = 85,893.75/x
  3. Step 3: Cross multiply
    153,863.51x = 212,342.34 × 85,893.75
  4. Step 4: Simplify right side
    153,863.51x = 18,238,879,866.38
  5. Step 5: Solve for x
    x = 18,238,879,866.38/153,863.51
  6. Step 6: Final answer
    x = 118,539.35

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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.