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Finding the Fourth Proportional to 65,407.86, 90,290.27 and 44,215.83

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Solution

The fourth proportional to 65,407.86, 90,290.27 and 44,215.83 is: 61,036.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,407.86 : 90,290.27 = 44,215.83 : x
  2. Step 2: Convert to fraction form
    65,407.86/90,290.27 = 44,215.83/x
  3. Step 3: Cross multiply
    65,407.86x = 90,290.27 × 44,215.83
  4. Step 4: Simplify right side
    65,407.86x = 3,992,259,339.51
  5. Step 5: Solve for x
    x = 3,992,259,339.51/65,407.86
  6. Step 6: Final answer
    x = 61,036.39

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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.