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Finding the Fourth Proportional to 70,170.64, 96,843.76 and 39,963.20

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Solution

The fourth proportional to 70,170.64, 96,843.76 and 39,963.20 is: 55,153.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,170.64 : 96,843.76 = 39,963.20 : x
  2. Step 2: Convert to fraction form
    70,170.64/96,843.76 = 39,963.20/x
  3. Step 3: Cross multiply
    70,170.64x = 96,843.76 × 39,963.20
  4. Step 4: Simplify right side
    70,170.64x = 3,870,186,549.63
  5. Step 5: Solve for x
    x = 3,870,186,549.63/70,170.64
  6. Step 6: Final answer
    x = 55,153.93

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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.