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Finding the Fourth Proportional to 425,761.44, 638,456.72 and 122,088.50

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Solution

The fourth proportional to 425,761.44, 638,456.72 and 122,088.50 is: 183,079.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,761.44 : 638,456.72 = 122,088.50 : x
  2. Step 2: Convert to fraction form
    425,761.44/638,456.72 = 122,088.50/x
  3. Step 3: Cross multiply
    425,761.44x = 638,456.72 × 122,088.50
  4. Step 4: Simplify right side
    425,761.44x = 77,948,219,456.99
  5. Step 5: Solve for x
    x = 77,948,219,456.99/425,761.44
  6. Step 6: Final answer
    x = 183,079.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.