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Finding the Fourth Proportional to 82,215.60, 123,323.40 and 70,940.40

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Solution

The fourth proportional to 82,215.60, 123,323.40 and 70,940.40 is: 106,410.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,215.60 : 123,323.40 = 70,940.40 : x
  2. Step 2: Convert to fraction form
    82,215.60/123,323.40 = 70,940.40/x
  3. Step 3: Cross multiply
    82,215.60x = 123,323.40 × 70,940.40
  4. Step 4: Simplify right side
    82,215.60x = 8,748,611,325.36
  5. Step 5: Solve for x
    x = 8,748,611,325.36/82,215.60
  6. Step 6: Final answer
    x = 106,410.60

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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.