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Finding the Fourth Proportional to 74,970.98, 112,400.92 and 45,381.82

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Solution

The fourth proportional to 74,970.98, 112,400.92 and 45,381.82 is: 68,039.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,970.98 : 112,400.92 = 45,381.82 : x
  2. Step 2: Convert to fraction form
    74,970.98/112,400.92 = 45,381.82/x
  3. Step 3: Cross multiply
    74,970.98x = 112,400.92 × 45,381.82
  4. Step 4: Simplify right side
    74,970.98x = 5,100,958,319.27
  5. Step 5: Solve for x
    x = 5,100,958,319.27/74,970.98
  6. Step 6: Final answer
    x = 68,039.10

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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.