Home / 99,137.50-136,812.63-54,428.38

Finding the Fourth Proportional to 99,137.50, 136,812.63 and 54,428.38

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Solution

The fourth proportional to 99,137.50, 136,812.63 and 54,428.38 is: 75,112.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,137.50 : 136,812.63 = 54,428.38 : x
  2. Step 2: Convert to fraction form
    99,137.50/136,812.63 = 54,428.38/x
  3. Step 3: Cross multiply
    99,137.50x = 136,812.63 × 54,428.38
  4. Step 4: Simplify right side
    99,137.50x = 7,446,489,814.44
  5. Step 5: Solve for x
    x = 7,446,489,814.44/99,137.50
  6. Step 6: Final answer
    x = 75,112.75

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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.