Home / 89,918.56-134,904.60-39,991.78

Finding the Fourth Proportional to 89,918.56, 134,904.60 and 39,991.78

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Solution

The fourth proportional to 89,918.56, 134,904.60 and 39,991.78 is: 59,999.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,918.56 : 134,904.60 = 39,991.78 : x
  2. Step 2: Convert to fraction form
    89,918.56/134,904.60 = 39,991.78/x
  3. Step 3: Cross multiply
    89,918.56x = 134,904.60 × 39,991.78
  4. Step 4: Simplify right side
    89,918.56x = 5,395,075,084.19
  5. Step 5: Solve for x
    x = 5,395,075,084.19/89,918.56
  6. Step 6: Final answer
    x = 59,999.57

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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.