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Finding the Fourth Proportional to 123,706.13, 170,715.06 and 67,117.50

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Solution

The fourth proportional to 123,706.13, 170,715.06 and 67,117.50 is: 92,622.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,706.13 : 170,715.06 = 67,117.50 : x
  2. Step 2: Convert to fraction form
    123,706.13/170,715.06 = 67,117.50/x
  3. Step 3: Cross multiply
    123,706.13x = 170,715.06 × 67,117.50
  4. Step 4: Simplify right side
    123,706.13x = 11,457,968,039.55
  5. Step 5: Solve for x
    x = 11,457,968,039.55/123,706.13
  6. Step 6: Final answer
    x = 92,622.48

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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.