Home / 65,972.07-91,024.16-39,120.57

Finding the Fourth Proportional to 65,972.07, 91,024.16 and 39,120.57

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Solution

The fourth proportional to 65,972.07, 91,024.16 and 39,120.57 is: 53,976.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,972.07 : 91,024.16 = 39,120.57 : x
  2. Step 2: Convert to fraction form
    65,972.07/91,024.16 = 39,120.57/x
  3. Step 3: Cross multiply
    65,972.07x = 91,024.16 × 39,120.57
  4. Step 4: Simplify right side
    65,972.07x = 3,560,916,827.37
  5. Step 5: Solve for x
    x = 3,560,916,827.37/65,972.07
  6. Step 6: Final answer
    x = 53,976.13

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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.