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Finding the Fourth Proportional to 99,424.63, 137,183.25 and 56,393.84

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Solution

The fourth proportional to 99,424.63, 137,183.25 and 56,393.84 is: 77,810.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,424.63 : 137,183.25 = 56,393.84 : x
  2. Step 2: Convert to fraction form
    99,424.63/137,183.25 = 56,393.84/x
  3. Step 3: Cross multiply
    99,424.63x = 137,183.25 × 56,393.84
  4. Step 4: Simplify right side
    99,424.63x = 7,736,289,283.29
  5. Step 5: Solve for x
    x = 7,736,289,283.29/99,424.63
  6. Step 6: Final answer
    x = 77,810.60

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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.