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Finding the Fourth Proportional to 74,965.58, 103,404.90 and 57,021.26

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Solution

The fourth proportional to 74,965.58, 103,404.90 and 57,021.26 is: 78,653.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,965.58 : 103,404.90 = 57,021.26 : x
  2. Step 2: Convert to fraction form
    74,965.58/103,404.90 = 57,021.26/x
  3. Step 3: Cross multiply
    74,965.58x = 103,404.90 × 57,021.26
  4. Step 4: Simplify right side
    74,965.58x = 5,896,277,688.17
  5. Step 5: Solve for x
    x = 5,896,277,688.17/74,965.58
  6. Step 6: Final answer
    x = 78,653.13

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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.