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Finding the Fourth Proportional to 74,215.36, 102,357.48 and 65,243.68

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Solution

The fourth proportional to 74,215.36, 102,357.48 and 65,243.68 is: 89,983.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,215.36 : 102,357.48 = 65,243.68 : x
  2. Step 2: Convert to fraction form
    74,215.36/102,357.48 = 65,243.68/x
  3. Step 3: Cross multiply
    74,215.36x = 102,357.48 × 65,243.68
  4. Step 4: Simplify right side
    74,215.36x = 6,678,178,670.73
  5. Step 5: Solve for x
    x = 6,678,178,670.73/74,215.36
  6. Step 6: Final answer
    x = 89,983.78

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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.