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Finding the Fourth Proportional to 74,973.70, 112,404.36 and 45,384.40

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Solution

The fourth proportional to 74,973.70, 112,404.36 and 45,384.40 is: 68,042.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,973.70 : 112,404.36 = 45,384.40 : x
  2. Step 2: Convert to fraction form
    74,973.70/112,404.36 = 45,384.40/x
  3. Step 3: Cross multiply
    74,973.70x = 112,404.36 × 45,384.40
  4. Step 4: Simplify right side
    74,973.70x = 5,101,404,435.98
  5. Step 5: Solve for x
    x = 5,101,404,435.98/74,973.70
  6. Step 6: Final answer
    x = 68,042.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.