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Finding the Fourth Proportional to 99,428.94, 137,211.96 and 54,716.94

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Solution

The fourth proportional to 99,428.94, 137,211.96 and 54,716.94 is: 75,509.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,428.94 : 137,211.96 = 54,716.94 : x
  2. Step 2: Convert to fraction form
    99,428.94/137,211.96 = 54,716.94/x
  3. Step 3: Cross multiply
    99,428.94x = 137,211.96 × 54,716.94
  4. Step 4: Simplify right side
    99,428.94x = 7,507,818,582.60
  5. Step 5: Solve for x
    x = 7,507,818,582.60/99,428.94
  6. Step 6: Final answer
    x = 75,509.39

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1.5x scale

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.