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Finding the Fourth Proportional to 74,491.60, 102,798.40 and 40,957.60

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Solution

The fourth proportional to 74,491.60, 102,798.40 and 40,957.60 is: 56,521.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,491.60 : 102,798.40 = 40,957.60 : x
  2. Step 2: Convert to fraction form
    74,491.60/102,798.40 = 40,957.60/x
  3. Step 3: Cross multiply
    74,491.60x = 102,798.40 × 40,957.60
  4. Step 4: Simplify right side
    74,491.60x = 4,210,375,747.84
  5. Step 5: Solve for x
    x = 4,210,375,747.84/74,491.60
  6. Step 6: Final answer
    x = 56,521.48

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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.