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Finding the Fourth Proportional to 74,491.89, 102,798.78 and 40,957.89

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Solution

The fourth proportional to 74,491.89, 102,798.78 and 40,957.89 is: 56,521.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,491.89 : 102,798.78 = 40,957.89 : x
  2. Step 2: Convert to fraction form
    74,491.89/102,798.78 = 40,957.89/x
  3. Step 3: Cross multiply
    74,491.89x = 102,798.78 × 40,957.89
  4. Step 4: Simplify right side
    74,491.89x = 4,210,421,123.37
  5. Step 5: Solve for x
    x = 4,210,421,123.37/74,491.89
  6. Step 6: Final answer
    x = 56,521.87

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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.