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Finding the Fourth Proportional to 71,068.02, 106,639.10 and 28,979.22

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Solution

The fourth proportional to 71,068.02, 106,639.10 and 28,979.22 is: 43,483.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,068.02 : 106,639.10 = 28,979.22 : x
  2. Step 2: Convert to fraction form
    71,068.02/106,639.10 = 28,979.22/x
  3. Step 3: Cross multiply
    71,068.02x = 106,639.10 × 28,979.22
  4. Step 4: Simplify right side
    71,068.02x = 3,090,317,939.50
  5. Step 5: Solve for x
    x = 3,090,317,939.50/71,068.02
  6. Step 6: Final answer
    x = 43,483.95

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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.