Home / 149,838.90-206,780.67-81,858.60

Finding the Fourth Proportional to 149,838.90, 206,780.67 and 81,858.60

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Solution

The fourth proportional to 149,838.90, 206,780.67 and 81,858.60 is: 112,966.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,838.90 : 206,780.67 = 81,858.60 : x
  2. Step 2: Convert to fraction form
    149,838.90/206,780.67 = 81,858.60/x
  3. Step 3: Cross multiply
    149,838.90x = 206,780.67 × 81,858.60
  4. Step 4: Simplify right side
    149,838.90x = 16,926,776,153.26
  5. Step 5: Solve for x
    x = 16,926,776,153.26/149,838.90
  6. Step 6: Final answer
    x = 112,966.50

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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.