Home / 128,531.80-192,812.10-39,784.60

Finding the Fourth Proportional to 128,531.80, 192,812.10 and 39,784.60

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Solution

The fourth proportional to 128,531.80, 192,812.10 and 39,784.60 is: 59,681.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,531.80 : 192,812.10 = 39,784.60 : x
  2. Step 2: Convert to fraction form
    128,531.80/192,812.10 = 39,784.60/x
  3. Step 3: Cross multiply
    128,531.80x = 192,812.10 × 39,784.60
  4. Step 4: Simplify right side
    128,531.80x = 7,670,952,273.66
  5. Step 5: Solve for x
    x = 7,670,952,273.66/128,531.80
  6. Step 6: Final answer
    x = 59,681.36

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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.