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Finding the Fourth Proportional to 71,068.32, 106,639.47 and 28,979.46

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Solution

The fourth proportional to 71,068.32, 106,639.47 and 28,979.46 is: 43,484.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,068.32 : 106,639.47 = 28,979.46 : x
  2. Step 2: Convert to fraction form
    71,068.32/106,639.47 = 28,979.46/x
  3. Step 3: Cross multiply
    71,068.32x = 106,639.47 × 28,979.46
  4. Step 4: Simplify right side
    71,068.32x = 3,090,354,255.29
  5. Step 5: Solve for x
    x = 3,090,354,255.29/71,068.32
  6. Step 6: Final answer
    x = 43,484.27

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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.