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Finding the Fourth Proportional to 98,490.24, 135,916.32 and 53,778.24

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Solution

The fourth proportional to 98,490.24, 135,916.32 and 53,778.24 is: 74,213.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,490.24 : 135,916.32 = 53,778.24 : x
  2. Step 2: Convert to fraction form
    98,490.24/135,916.32 = 53,778.24/x
  3. Step 3: Cross multiply
    98,490.24x = 135,916.32 × 53,778.24
  4. Step 4: Simplify right side
    98,490.24x = 7,309,340,476.88
  5. Step 5: Solve for x
    x = 7,309,340,476.88/98,490.24
  6. Step 6: Final answer
    x = 74,213.86

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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.