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Finding the Fourth Proportional to 81,798.81, 122,699.76 and 25,637.68

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Solution

The fourth proportional to 81,798.81, 122,699.76 and 25,637.68 is: 38,457.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,798.81 : 122,699.76 = 25,637.68 : x
  2. Step 2: Convert to fraction form
    81,798.81/122,699.76 = 25,637.68/x
  3. Step 3: Cross multiply
    81,798.81x = 122,699.76 × 25,637.68
  4. Step 4: Simplify right side
    81,798.81x = 3,145,737,182.96
  5. Step 5: Solve for x
    x = 3,145,737,182.96/81,798.81
  6. Step 6: Final answer
    x = 38,457.00

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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.