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Finding the Fourth Proportional to 70,186.60, 96,846.36 and 39,972.51

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Solution

The fourth proportional to 70,186.60, 96,846.36 and 39,972.51 is: 55,155.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,186.60 : 96,846.36 = 39,972.51 : x
  2. Step 2: Convert to fraction form
    70,186.60/96,846.36 = 39,972.51/x
  3. Step 3: Cross multiply
    70,186.60x = 96,846.36 × 39,972.51
  4. Step 4: Simplify right side
    70,186.60x = 3,871,192,328.47
  5. Step 5: Solve for x
    x = 3,871,192,328.47/70,186.60
  6. Step 6: Final answer
    x = 55,155.72

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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.