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Finding the Fourth Proportional to 123,903.93, 170,991.41 and 70,187.76

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Solution

The fourth proportional to 123,903.93, 170,991.41 and 70,187.76 is: 96,861.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,903.93 : 170,991.41 = 70,187.76 : x
  2. Step 2: Convert to fraction form
    123,903.93/170,991.41 = 70,187.76/x
  3. Step 3: Cross multiply
    123,903.93x = 170,991.41 × 70,187.76
  4. Step 4: Simplify right side
    123,903.93x = 12,001,503,696.20
  5. Step 5: Solve for x
    x = 12,001,503,696.20/123,903.93
  6. Step 6: Final answer
    x = 96,861.36

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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.