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Finding the Fourth Proportional to 70,143.80, 96,799.02 and 39,931.48

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Solution

The fourth proportional to 70,143.80, 96,799.02 and 39,931.48 is: 55,105.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,143.80 : 96,799.02 = 39,931.48 : x
  2. Step 2: Convert to fraction form
    70,143.80/96,799.02 = 39,931.48/x
  3. Step 3: Cross multiply
    70,143.80x = 96,799.02 × 39,931.48
  4. Step 4: Simplify right side
    70,143.80x = 3,865,328,131.15
  5. Step 5: Solve for x
    x = 3,865,328,131.15/70,143.80
  6. Step 6: Final answer
    x = 55,105.77

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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.