Home / 81,237.56-121,878.07-25,075.40

Finding the Fourth Proportional to 81,237.56, 121,878.07 and 25,075.40

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Solution

The fourth proportional to 81,237.56, 121,878.07 and 25,075.40 is: 37,619.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,237.56 : 121,878.07 = 25,075.40 : x
  2. Step 2: Convert to fraction form
    81,237.56/121,878.07 = 25,075.40/x
  3. Step 3: Cross multiply
    81,237.56x = 121,878.07 × 25,075.40
  4. Step 4: Simplify right side
    81,237.56x = 3,056,140,684.40
  5. Step 5: Solve for x
    x = 3,056,140,684.40/81,237.56
  6. Step 6: Final answer
    x = 37,619.80

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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.