Home / 205,986.31-308,729.95-87,408.55

Finding the Fourth Proportional to 205,986.31, 308,729.95 and 87,408.55

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Solution

The fourth proportional to 205,986.31, 308,729.95 and 87,408.55 is: 131,006.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,986.31 : 308,729.95 = 87,408.55 : x
  2. Step 2: Convert to fraction form
    205,986.31/308,729.95 = 87,408.55/x
  3. Step 3: Cross multiply
    205,986.31x = 308,729.95 × 87,408.55
  4. Step 4: Simplify right side
    205,986.31x = 26,985,637,271.07
  5. Step 5: Solve for x
    x = 26,985,637,271.07/205,986.31
  6. Step 6: Final answer
    x = 131,006.95

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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.