Home / 258,885.12-388,330.24-71,897.60

Finding the Fourth Proportional to 258,885.12, 388,330.24 and 71,897.60

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Solution

The fourth proportional to 258,885.12, 388,330.24 and 71,897.60 is: 107,847.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,885.12 : 388,330.24 = 71,897.60 : x
  2. Step 2: Convert to fraction form
    258,885.12/388,330.24 = 71,897.60/x
  3. Step 3: Cross multiply
    258,885.12x = 388,330.24 × 71,897.60
  4. Step 4: Simplify right side
    258,885.12x = 27,920,012,263.42
  5. Step 5: Solve for x
    x = 27,920,012,263.42/258,885.12
  6. Step 6: Final answer
    x = 107,847.11

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1.5x scale

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.