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Finding the Fourth Proportional to 101,292.74, 139,803.32 and 66,776.91

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Solution

The fourth proportional to 101,292.74, 139,803.32 and 66,776.91 is: 92,164.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,292.74 : 139,803.32 = 66,776.91 : x
  2. Step 2: Convert to fraction form
    101,292.74/139,803.32 = 66,776.91/x
  3. Step 3: Cross multiply
    101,292.74x = 139,803.32 × 66,776.91
  4. Step 4: Simplify right side
    101,292.74x = 9,335,632,684.44
  5. Step 5: Solve for x
    x = 9,335,632,684.44/101,292.74
  6. Step 6: Final answer
    x = 92,164.88

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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.