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Finding the Fourth Proportional to 74,692.70, 112,072 and 39,623.76

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Solution

The fourth proportional to 74,692.70, 112,072 and 39,623.76 is: 59,453.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,692.70 : 112,072 = 39,623.76 : x
  2. Step 2: Convert to fraction form
    74,692.70/112,072 = 39,623.76/x
  3. Step 3: Cross multiply
    74,692.70x = 112,072 × 39,623.76
  4. Step 4: Simplify right side
    74,692.70x = 4,440,714,030.72
  5. Step 5: Solve for x
    x = 4,440,714,030.72/74,692.70
  6. Step 6: Final answer
    x = 59,453.12

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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.