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Finding the Fourth Proportional to 70,210.90, 96,879.72 and 39,996.82

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Solution

The fourth proportional to 70,210.90, 96,879.72 and 39,996.82 is: 55,189.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,210.90 : 96,879.72 = 39,996.82 : x
  2. Step 2: Convert to fraction form
    70,210.90/96,879.72 = 39,996.82/x
  3. Step 3: Cross multiply
    70,210.90x = 96,879.72 × 39,996.82
  4. Step 4: Simplify right side
    70,210.90x = 3,874,880,722.49
  5. Step 5: Solve for x
    x = 3,874,880,722.49/70,210.90
  6. Step 6: Final answer
    x = 55,189.16

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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.