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Finding the Fourth Proportional to 90,644.94, 125,123.70 and 77,846.73

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Solution

The fourth proportional to 90,644.94, 125,123.70 and 77,846.73 is: 107,457.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,644.94 : 125,123.70 = 77,846.73 : x
  2. Step 2: Convert to fraction form
    90,644.94/125,123.70 = 77,846.73/x
  3. Step 3: Cross multiply
    90,644.94x = 125,123.70 × 77,846.73
  4. Step 4: Simplify right side
    90,644.94x = 9,740,470,890.50
  5. Step 5: Solve for x
    x = 9,740,470,890.50/90,644.94
  6. Step 6: Final answer
    x = 107,457.41

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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.