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Finding the Fourth Proportional to 64,665.38, 89,212.90 and 47,710.32

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Solution

The fourth proportional to 64,665.38, 89,212.90 and 47,710.32 is: 65,821.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,665.38 : 89,212.90 = 47,710.32 : x
  2. Step 2: Convert to fraction form
    64,665.38/89,212.90 = 47,710.32/x
  3. Step 3: Cross multiply
    64,665.38x = 89,212.90 × 47,710.32
  4. Step 4: Simplify right side
    64,665.38x = 4,256,376,007.13
  5. Step 5: Solve for x
    x = 4,256,376,007.13/64,665.38
  6. Step 6: Final answer
    x = 65,821.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.