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Finding the Fourth Proportional to 74,857.02, 103,040.49 and 65,280.02

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Solution

The fourth proportional to 74,857.02, 103,040.49 and 65,280.02 is: 89,857.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,857.02 : 103,040.49 = 65,280.02 : x
  2. Step 2: Convert to fraction form
    74,857.02/103,040.49 = 65,280.02/x
  3. Step 3: Cross multiply
    74,857.02x = 103,040.49 × 65,280.02
  4. Step 4: Simplify right side
    74,857.02x = 6,726,484,732.81
  5. Step 5: Solve for x
    x = 6,726,484,732.81/74,857.02
  6. Step 6: Final answer
    x = 89,857.77

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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.