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Finding the Fourth Proportional to 89,779.49, 123,890.13 and 49,493.60

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Solution

The fourth proportional to 89,779.49, 123,890.13 and 49,493.60 is: 68,298.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,779.49 : 123,890.13 = 49,493.60 : x
  2. Step 2: Convert to fraction form
    89,779.49/123,890.13 = 49,493.60/x
  3. Step 3: Cross multiply
    89,779.49x = 123,890.13 × 49,493.60
  4. Step 4: Simplify right side
    89,779.49x = 6,131,768,538.17
  5. Step 5: Solve for x
    x = 6,131,768,538.17/89,779.49
  6. Step 6: Final answer
    x = 68,298.10

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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.