Home / 210,380.54-315,573.60-70,139.21

Finding the Fourth Proportional to 210,380.54, 315,573.60 and 70,139.21

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Solution

The fourth proportional to 210,380.54, 315,573.60 and 70,139.21 is: 105,209.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,380.54 : 315,573.60 = 70,139.21 : x
  2. Step 2: Convert to fraction form
    210,380.54/315,573.60 = 70,139.21/x
  3. Step 3: Cross multiply
    210,380.54x = 315,573.60 × 70,139.21
  4. Step 4: Simplify right side
    210,380.54x = 22,134,083,000.86
  5. Step 5: Solve for x
    x = 22,134,083,000.86/210,380.54
  6. Step 6: Final answer
    x = 105,209.75

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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.