Home / 91,439.64-136,338-83,629.08

Finding the Fourth Proportional to 91,439.64, 136,338 and 83,629.08

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Solution

The fourth proportional to 91,439.64, 136,338 and 83,629.08 is: 124,692.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,439.64 : 136,338 = 83,629.08 : x
  2. Step 2: Convert to fraction form
    91,439.64/136,338 = 83,629.08/x
  3. Step 3: Cross multiply
    91,439.64x = 136,338 × 83,629.08
  4. Step 4: Simplify right side
    91,439.64x = 11,401,821,509.04
  5. Step 5: Solve for x
    x = 11,401,821,509.04/91,439.64
  6. Step 6: Final answer
    x = 124,692.33

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.