Home / 128,762.07-193,172.94-40,010.78

Finding the Fourth Proportional to 128,762.07, 193,172.94 and 40,010.78

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Solution

The fourth proportional to 128,762.07, 193,172.94 and 40,010.78 is: 60,025.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,762.07 : 193,172.94 = 40,010.78 : x
  2. Step 2: Convert to fraction form
    128,762.07/193,172.94 = 40,010.78/x
  3. Step 3: Cross multiply
    128,762.07x = 193,172.94 × 40,010.78
  4. Step 4: Simplify right side
    128,762.07x = 7,728,999,038.43
  5. Step 5: Solve for x
    x = 7,728,999,038.43/128,762.07
  6. Step 6: Final answer
    x = 60,025.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.