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Finding the Fourth Proportional to 64,571.71, 89,151.99 and 40,409.41

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Solution

The fourth proportional to 64,571.71, 89,151.99 and 40,409.41 is: 55,791.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,571.71 : 89,151.99 = 40,409.41 : x
  2. Step 2: Convert to fraction form
    64,571.71/89,151.99 = 40,409.41/x
  3. Step 3: Cross multiply
    64,571.71x = 89,151.99 × 40,409.41
  4. Step 4: Simplify right side
    64,571.71x = 3,602,578,870.47
  5. Step 5: Solve for x
    x = 3,602,578,870.47/64,571.71
  6. Step 6: Final answer
    x = 55,791.91

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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.