Home / 128,273.94-192,429-39,534.66

Finding the Fourth Proportional to 128,273.94, 192,429 and 39,534.66

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Solution

The fourth proportional to 128,273.94, 192,429 and 39,534.66 is: 59,307.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,273.94 : 192,429 = 39,534.66 : x
  2. Step 2: Convert to fraction form
    128,273.94/192,429 = 39,534.66/x
  3. Step 3: Cross multiply
    128,273.94x = 192,429 × 39,534.66
  4. Step 4: Simplify right side
    128,273.94x = 7,607,615,089.14
  5. Step 5: Solve for x
    x = 7,607,615,089.14/128,273.94
  6. Step 6: Final answer
    x = 59,307.57

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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.