Home / 137,075.20-205,455.35-85,806.89

Finding the Fourth Proportional to 137,075.20, 205,455.35 and 85,806.89

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Solution

The fourth proportional to 137,075.20, 205,455.35 and 85,806.89 is: 128,611.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,075.20 : 205,455.35 = 85,806.89 : x
  2. Step 2: Convert to fraction form
    137,075.20/205,455.35 = 85,806.89/x
  3. Step 3: Cross multiply
    137,075.20x = 205,455.35 × 85,806.89
  4. Step 4: Simplify right side
    137,075.20x = 17,629,484,617.36
  5. Step 5: Solve for x
    x = 17,629,484,617.36/137,075.20
  6. Step 6: Final answer
    x = 128,611.77

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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.