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Finding the Fourth Proportional to 70,871.20, 97,798.64 and 39,039.42

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Solution

The fourth proportional to 70,871.20, 97,798.64 and 39,039.42 is: 53,872.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,871.20 : 97,798.64 = 39,039.42 : x
  2. Step 2: Convert to fraction form
    70,871.20/97,798.64 = 39,039.42/x
  3. Step 3: Cross multiply
    70,871.20x = 97,798.64 × 39,039.42
  4. Step 4: Simplify right side
    70,871.20x = 3,818,002,182.39
  5. Step 5: Solve for x
    x = 3,818,002,182.39/70,871.20
  6. Step 6: Final answer
    x = 53,872.41

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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.