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Finding the Fourth Proportional to 64,813.70, 89,415.06 and 39,310.32

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Solution

The fourth proportional to 64,813.70, 89,415.06 and 39,310.32 is: 54,231.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,813.70 : 89,415.06 = 39,310.32 : x
  2. Step 2: Convert to fraction form
    64,813.70/89,415.06 = 39,310.32/x
  3. Step 3: Cross multiply
    64,813.70x = 89,415.06 × 39,310.32
  4. Step 4: Simplify right side
    64,813.70x = 3,514,934,621.42
  5. Step 5: Solve for x
    x = 3,514,934,621.42/64,813.70
  6. Step 6: Final answer
    x = 54,231.36

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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.