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Finding the Fourth Proportional to 54,355.79, 81,440.74 and 42,504.99

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Solution

The fourth proportional to 54,355.79, 81,440.74 and 42,504.99 is: 63,684.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,355.79 : 81,440.74 = 42,504.99 : x
  2. Step 2: Convert to fraction form
    54,355.79/81,440.74 = 42,504.99/x
  3. Step 3: Cross multiply
    54,355.79x = 81,440.74 × 42,504.99
  4. Step 4: Simplify right side
    54,355.79x = 3,461,637,587.02
  5. Step 5: Solve for x
    x = 3,461,637,587.02/54,355.79
  6. Step 6: Final answer
    x = 63,684.80

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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.