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Finding the Fourth Proportional to 64,920.90, 89,590.84 and 35,112.90

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Solution

The fourth proportional to 64,920.90, 89,590.84 and 35,112.90 is: 48,455.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,920.90 : 89,590.84 = 35,112.90 : x
  2. Step 2: Convert to fraction form
    64,920.90/89,590.84 = 35,112.90/x
  3. Step 3: Cross multiply
    64,920.90x = 89,590.84 × 35,112.90
  4. Step 4: Simplify right side
    64,920.90x = 3,145,794,205.84
  5. Step 5: Solve for x
    x = 3,145,794,205.84/64,920.90
  6. Step 6: Final answer
    x = 48,455.80

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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.