Home / 66,120.12-91,236.06-39,263.76

Finding the Fourth Proportional to 66,120.12, 91,236.06 and 39,263.76

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Solution

The fourth proportional to 66,120.12, 91,236.06 and 39,263.76 is: 54,178.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,120.12 : 91,236.06 = 39,263.76 : x
  2. Step 2: Convert to fraction form
    66,120.12/91,236.06 = 39,263.76/x
  3. Step 3: Cross multiply
    66,120.12x = 91,236.06 × 39,263.76
  4. Step 4: Simplify right side
    66,120.12x = 3,582,270,763.19
  5. Step 5: Solve for x
    x = 3,582,270,763.19/66,120.12
  6. Step 6: Final answer
    x = 54,178.23

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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.