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Finding the Fourth Proportional to 89,700.21, 123,790.95 and 53,891.73

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Solution

The fourth proportional to 89,700.21, 123,790.95 and 53,891.73 is: 74,373.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,700.21 : 123,790.95 = 53,891.73 : x
  2. Step 2: Convert to fraction form
    89,700.21/123,790.95 = 53,891.73/x
  3. Step 3: Cross multiply
    89,700.21x = 123,790.95 × 53,891.73
  4. Step 4: Simplify right side
    89,700.21x = 6,671,308,453.84
  5. Step 5: Solve for x
    x = 6,671,308,453.84/89,700.21
  6. Step 6: Final answer
    x = 74,373.39

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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.