Home / 85,986.10-128,979.15-50,907.70

Finding the Fourth Proportional to 85,986.10, 128,979.15 and 50,907.70

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Solution

The fourth proportional to 85,986.10, 128,979.15 and 50,907.70 is: 76,361.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,986.10 : 128,979.15 = 50,907.70 : x
  2. Step 2: Convert to fraction form
    85,986.10/128,979.15 = 50,907.70/x
  3. Step 3: Cross multiply
    85,986.10x = 128,979.15 × 50,907.70
  4. Step 4: Simplify right side
    85,986.10x = 6,566,031,874.46
  5. Step 5: Solve for x
    x = 6,566,031,874.46/85,986.10
  6. Step 6: Final answer
    x = 76,361.55

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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.