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Finding the Fourth Proportional to 69,962.40, 104,912.64 and 20,031.12

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Solution

The fourth proportional to 69,962.40, 104,912.64 and 20,031.12 is: 30,037.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,962.40 : 104,912.64 = 20,031.12 : x
  2. Step 2: Convert to fraction form
    69,962.40/104,912.64 = 20,031.12/x
  3. Step 3: Cross multiply
    69,962.40x = 104,912.64 × 20,031.12
  4. Step 4: Simplify right side
    69,962.40x = 2,101,517,681.36
  5. Step 5: Solve for x
    x = 2,101,517,681.36/69,962.40
  6. Step 6: Final answer
    x = 30,037.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.