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Finding the Fourth Proportional to 74,499.14, 102,810.81 and 40,509.89

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Solution

The fourth proportional to 74,499.14, 102,810.81 and 40,509.89 is: 55,904.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,499.14 : 102,810.81 = 40,509.89 : x
  2. Step 2: Convert to fraction form
    74,499.14/102,810.81 = 40,509.89/x
  3. Step 3: Cross multiply
    74,499.14x = 102,810.81 × 40,509.89
  4. Step 4: Simplify right side
    74,499.14x = 4,164,854,603.91
  5. Step 5: Solve for x
    x = 4,164,854,603.91/74,499.14
  6. Step 6: Final answer
    x = 55,904.73

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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.