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Finding the Fourth Proportional to 89,880.49, 124,080.00 and 55,899.90

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Solution

The fourth proportional to 89,880.49, 124,080.00 and 55,899.90 is: 77,169.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,880.49 : 124,080.00 = 55,899.90 : x
  2. Step 2: Convert to fraction form
    89,880.49/124,080.00 = 55,899.90/x
  3. Step 3: Cross multiply
    89,880.49x = 124,080.00 × 55,899.90
  4. Step 4: Simplify right side
    89,880.49x = 6,936,059,347.84
  5. Step 5: Solve for x
    x = 6,936,059,347.84/89,880.49
  6. Step 6: Final answer
    x = 77,169.80

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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.