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Finding the Fourth Proportional to 123,720.68, 170,729.96 and 67,130.84

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Solution

The fourth proportional to 123,720.68, 170,729.96 and 67,130.84 is: 92,638.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,720.68 : 170,729.96 = 67,130.84 : x
  2. Step 2: Convert to fraction form
    123,720.68/170,729.96 = 67,130.84/x
  3. Step 3: Cross multiply
    123,720.68x = 170,729.96 × 67,130.84
  4. Step 4: Simplify right side
    123,720.68x = 11,461,245,627.97
  5. Step 5: Solve for x
    x = 11,461,245,627.97/123,720.68
  6. Step 6: Final answer
    x = 92,638.07

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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.