Home / 90,528.80-124,486.62-78,571.31

Finding the Fourth Proportional to 90,528.80, 124,486.62 and 78,571.31

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Solution

The fourth proportional to 90,528.80, 124,486.62 and 78,571.31 is: 108,043.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,528.80 : 124,486.62 = 78,571.31 : x
  2. Step 2: Convert to fraction form
    90,528.80/124,486.62 = 78,571.31/x
  3. Step 3: Cross multiply
    90,528.80x = 124,486.62 × 78,571.31
  4. Step 4: Simplify right side
    90,528.80x = 9,781,076,810.87
  5. Step 5: Solve for x
    x = 9,781,076,810.87/90,528.80
  6. Step 6: Final answer
    x = 108,043.81

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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.