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Finding the Fourth Proportional to 101,628, 140,246.64 and 56,916

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Solution

The fourth proportional to 101,628, 140,246.64 and 56,916 is: 78,544.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,628 : 140,246.64 = 56,916 : x
  2. Step 2: Convert to fraction form
    101,628/140,246.64 = 56,916/x
  3. Step 3: Cross multiply
    101,628x = 140,246.64 × 56,916
  4. Step 4: Simplify right side
    101,628x = 7,982,277,762.24
  5. Step 5: Solve for x
    x = 7,982,277,762.24/101,628
  6. Step 6: Final answer
    x = 78,544.08

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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.