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Finding the Fourth Proportional to 74,805.89, 112,111.89 and 30,381.04

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Solution

The fourth proportional to 74,805.89, 112,111.89 and 30,381.04 is: 45,532.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,805.89 : 112,111.89 = 30,381.04 : x
  2. Step 2: Convert to fraction form
    74,805.89/112,111.89 = 30,381.04/x
  3. Step 3: Cross multiply
    74,805.89x = 112,111.89 × 30,381.04
  4. Step 4: Simplify right side
    74,805.89x = 3,406,075,102.10
  5. Step 5: Solve for x
    x = 3,406,075,102.10/74,805.89
  6. Step 6: Final answer
    x = 45,532.18

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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.