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Finding the Fourth Proportional to 61,921.63, 85,487.28 and 40,762.41

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Solution

The fourth proportional to 61,921.63, 85,487.28 and 40,762.41 is: 56,275.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,921.63 : 85,487.28 = 40,762.41 : x
  2. Step 2: Convert to fraction form
    61,921.63/85,487.28 = 40,762.41/x
  3. Step 3: Cross multiply
    61,921.63x = 85,487.28 × 40,762.41
  4. Step 4: Simplify right side
    61,921.63x = 3,484,667,313.00
  5. Step 5: Solve for x
    x = 3,484,667,313.00/61,921.63
  6. Step 6: Final answer
    x = 56,275.44

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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.