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Finding the Fourth Proportional to 123,660.80, 170,653.20 and 69,946.40

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Solution

The fourth proportional to 123,660.80, 170,653.20 and 69,946.40 is: 96,526.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,660.80 : 170,653.20 = 69,946.40 : x
  2. Step 2: Convert to fraction form
    123,660.80/170,653.20 = 69,946.40/x
  3. Step 3: Cross multiply
    123,660.80x = 170,653.20 × 69,946.40
  4. Step 4: Simplify right side
    123,660.80x = 11,936,576,988.48
  5. Step 5: Solve for x
    x = 11,936,576,988.48/123,660.80
  6. Step 6: Final answer
    x = 96,526.77

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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.