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Finding the Fourth Proportional to 123,891.58, 170,955.87 and 72,893.10

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Solution

The fourth proportional to 123,891.58, 170,955.87 and 72,893.10 is: 100,583.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,891.58 : 170,955.87 = 72,893.10 : x
  2. Step 2: Convert to fraction form
    123,891.58/170,955.87 = 72,893.10/x
  3. Step 3: Cross multiply
    123,891.58x = 170,955.87 × 72,893.10
  4. Step 4: Simplify right side
    123,891.58x = 12,461,503,327.50
  5. Step 5: Solve for x
    x = 12,461,503,327.50/123,891.58
  6. Step 6: Final answer
    x = 100,583.94

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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.