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Finding the Fourth Proportional to 74,700, 112,072.32 and 30,318.24

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Solution

The fourth proportional to 74,700, 112,072.32 and 30,318.24 is: 45,486.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,700 : 112,072.32 = 30,318.24 : x
  2. Step 2: Convert to fraction form
    74,700/112,072.32 = 30,318.24/x
  3. Step 3: Cross multiply
    74,700x = 112,072.32 × 30,318.24
  4. Step 4: Simplify right side
    74,700x = 3,397,835,495.12
  5. Step 5: Solve for x
    x = 3,397,835,495.12/74,700
  6. Step 6: Final answer
    x = 45,486.42

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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.