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Finding the Fourth Proportional to 77,447.34, 106,940.35 and 63,109.33

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Solution

The fourth proportional to 77,447.34, 106,940.35 and 63,109.33 is: 87,142.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,447.34 : 106,940.35 = 63,109.33 : x
  2. Step 2: Convert to fraction form
    77,447.34/106,940.35 = 63,109.33/x
  3. Step 3: Cross multiply
    77,447.34x = 106,940.35 × 63,109.33
  4. Step 4: Simplify right side
    77,447.34x = 6,748,933,650.00
  5. Step 5: Solve for x
    x = 6,748,933,650.00/77,447.34
  6. Step 6: Final answer
    x = 87,142.23

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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.