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Finding the Fourth Proportional to 210,396.54, 315,597.60 and 70,155.21

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Solution

The fourth proportional to 210,396.54, 315,597.60 and 70,155.21 is: 105,233.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,396.54 : 315,597.60 = 70,155.21 : x
  2. Step 2: Convert to fraction form
    210,396.54/315,597.60 = 70,155.21/x
  3. Step 3: Cross multiply
    210,396.54x = 315,597.60 × 70,155.21
  4. Step 4: Simplify right side
    210,396.54x = 22,140,815,903.50
  5. Step 5: Solve for x
    x = 22,140,815,903.50/210,396.54
  6. Step 6: Final answer
    x = 105,233.75

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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.