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Finding the Fourth Proportional to 47,377.92, 65,369.84 and 28,976.40

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Solution

The fourth proportional to 47,377.92, 65,369.84 and 28,976.40 is: 39,980.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,377.92 : 65,369.84 = 28,976.40 : x
  2. Step 2: Convert to fraction form
    47,377.92/65,369.84 = 28,976.40/x
  3. Step 3: Cross multiply
    47,377.92x = 65,369.84 × 28,976.40
  4. Step 4: Simplify right side
    47,377.92x = 1,894,182,631.78
  5. Step 5: Solve for x
    x = 1,894,182,631.78/47,377.92
  6. Step 6: Final answer
    x = 39,980.28

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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.