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Finding the Fourth Proportional to 61,428.76, 84,803.69 and 41,390.98

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Solution

The fourth proportional to 61,428.76, 84,803.69 and 41,390.98 is: 57,141.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,428.76 : 84,803.69 = 41,390.98 : x
  2. Step 2: Convert to fraction form
    61,428.76/84,803.69 = 41,390.98/x
  3. Step 3: Cross multiply
    61,428.76x = 84,803.69 × 41,390.98
  4. Step 4: Simplify right side
    61,428.76x = 3,510,107,836.72
  5. Step 5: Solve for x
    x = 3,510,107,836.72/61,428.76
  6. Step 6: Final answer
    x = 57,141.11

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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.