Home / 66,005.96-91,088.42-39,161.76

Finding the Fourth Proportional to 66,005.96, 91,088.42 and 39,161.76

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Solution

The fourth proportional to 66,005.96, 91,088.42 and 39,161.76 is: 54,043.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,005.96 : 91,088.42 = 39,161.76 : x
  2. Step 2: Convert to fraction form
    66,005.96/91,088.42 = 39,161.76/x
  3. Step 3: Cross multiply
    66,005.96x = 91,088.42 × 39,161.76
  4. Step 4: Simplify right side
    66,005.96x = 3,567,182,842.82
  5. Step 5: Solve for x
    x = 3,567,182,842.82/66,005.96
  6. Step 6: Final answer
    x = 54,043.34

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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.