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Finding the Fourth Proportional to 84,955.25, 117,065.49 and 65,718.20

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Solution

The fourth proportional to 84,955.25, 117,065.49 and 65,718.20 is: 90,557.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,955.25 : 117,065.49 = 65,718.20 : x
  2. Step 2: Convert to fraction form
    84,955.25/117,065.49 = 65,718.20/x
  3. Step 3: Cross multiply
    84,955.25x = 117,065.49 × 65,718.20
  4. Step 4: Simplify right side
    84,955.25x = 7,693,332,699.59
  5. Step 5: Solve for x
    x = 7,693,332,699.59/84,955.25
  6. Step 6: Final answer
    x = 90,557.48

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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.