Home / 210,196.20-315,075.60-115,280.40

Finding the Fourth Proportional to 210,196.20, 315,075.60 and 115,280.40

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Solution

The fourth proportional to 210,196.20, 315,075.60 and 115,280.40 is: 172,800.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,196.20 : 315,075.60 = 115,280.40 : x
  2. Step 2: Convert to fraction form
    210,196.20/315,075.60 = 115,280.40/x
  3. Step 3: Cross multiply
    210,196.20x = 315,075.60 × 115,280.40
  4. Step 4: Simplify right side
    210,196.20x = 36,322,041,198.24
  5. Step 5: Solve for x
    x = 36,322,041,198.24/210,196.20
  6. Step 6: Final answer
    x = 172,800.66

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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.