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Finding the Fourth Proportional to 123,964.40, 185,946.60 and 86,639.60

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Solution

The fourth proportional to 123,964.40, 185,946.60 and 86,639.60 is: 129,959.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,964.40 : 185,946.60 = 86,639.60 : x
  2. Step 2: Convert to fraction form
    123,964.40/185,946.60 = 86,639.60/x
  3. Step 3: Cross multiply
    123,964.40x = 185,946.60 × 86,639.60
  4. Step 4: Simplify right side
    123,964.40x = 16,110,339,045.36
  5. Step 5: Solve for x
    x = 16,110,339,045.36/123,964.40
  6. Step 6: Final answer
    x = 129,959.40

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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.