Home / 149,784.48-206,685.54-86,142.78

Finding the Fourth Proportional to 149,784.48, 206,685.54 and 86,142.78

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Solution

The fourth proportional to 149,784.48, 206,685.54 and 86,142.78 is: 118,867.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,784.48 : 206,685.54 = 86,142.78 : x
  2. Step 2: Convert to fraction form
    149,784.48/206,685.54 = 86,142.78/x
  3. Step 3: Cross multiply
    149,784.48x = 206,685.54 × 86,142.78
  4. Step 4: Simplify right side
    149,784.48x = 17,804,467,001.40
  5. Step 5: Solve for x
    x = 17,804,467,001.40/149,784.48
  6. Step 6: Final answer
    x = 118,867.24

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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.