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Finding the Fourth Proportional to 123,098.50, 169,885.65 and 68,658.40

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Solution

The fourth proportional to 123,098.50, 169,885.65 and 68,658.40 is: 94,754.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,098.50 : 169,885.65 = 68,658.40 : x
  2. Step 2: Convert to fraction form
    123,098.50/169,885.65 = 68,658.40/x
  3. Step 3: Cross multiply
    123,098.50x = 169,885.65 × 68,658.40
  4. Step 4: Simplify right side
    123,098.50x = 11,664,076,911.96
  5. Step 5: Solve for x
    x = 11,664,076,911.96/123,098.50
  6. Step 6: Final answer
    x = 94,754.01

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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.