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Finding the Fourth Proportional to 99,709.94, 137,599.82 and 57,276.68

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Solution

The fourth proportional to 99,709.94, 137,599.82 and 57,276.68 is: 79,041.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,709.94 : 137,599.82 = 57,276.68 : x
  2. Step 2: Convert to fraction form
    99,709.94/137,599.82 = 57,276.68/x
  3. Step 3: Cross multiply
    99,709.94x = 137,599.82 × 57,276.68
  4. Step 4: Simplify right side
    99,709.94x = 7,881,260,858.20
  5. Step 5: Solve for x
    x = 7,881,260,858.20/99,709.94
  6. Step 6: Final answer
    x = 79,041.88

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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.