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Finding the Fourth Proportional to 89,641.50, 123,739.11 and 70,471.26

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Solution

The fourth proportional to 89,641.50, 123,739.11 and 70,471.26 is: 97,276.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,641.50 : 123,739.11 = 70,471.26 : x
  2. Step 2: Convert to fraction form
    89,641.50/123,739.11 = 70,471.26/x
  3. Step 3: Cross multiply
    89,641.50x = 123,739.11 × 70,471.26
  4. Step 4: Simplify right side
    89,641.50x = 8,720,050,992.98
  5. Step 5: Solve for x
    x = 8,720,050,992.98/89,641.50
  6. Step 6: Final answer
    x = 97,276.94

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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.