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Finding the Fourth Proportional to 77,068.38, 115,602.57 and 21,664.38

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Solution

The fourth proportional to 77,068.38, 115,602.57 and 21,664.38 is: 32,496.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,068.38 : 115,602.57 = 21,664.38 : x
  2. Step 2: Convert to fraction form
    77,068.38/115,602.57 = 21,664.38/x
  3. Step 3: Cross multiply
    77,068.38x = 115,602.57 × 21,664.38
  4. Step 4: Simplify right side
    77,068.38x = 2,504,457,319.12
  5. Step 5: Solve for x
    x = 2,504,457,319.12/77,068.38
  6. Step 6: Final answer
    x = 32,496.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.