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Finding the Fourth Proportional to 51,466.40, 70,928.40 and 38,871.20

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Solution

The fourth proportional to 51,466.40, 70,928.40 and 38,871.20 is: 53,570.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,466.40 : 70,928.40 = 38,871.20 : x
  2. Step 2: Convert to fraction form
    51,466.40/70,928.40 = 38,871.20/x
  3. Step 3: Cross multiply
    51,466.40x = 70,928.40 × 38,871.20
  4. Step 4: Simplify right side
    51,466.40x = 2,757,072,022.08
  5. Step 5: Solve for x
    x = 2,757,072,022.08/51,466.40
  6. Step 6: Final answer
    x = 53,570.33

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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.