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Finding the Fourth Proportional to 210,379.54, 315,572.10 and 70,138.21

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Solution

The fourth proportional to 210,379.54, 315,572.10 and 70,138.21 is: 105,208.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,379.54 : 315,572.10 = 70,138.21 : x
  2. Step 2: Convert to fraction form
    210,379.54/315,572.10 = 70,138.21/x
  3. Step 3: Cross multiply
    210,379.54x = 315,572.10 × 70,138.21
  4. Step 4: Simplify right side
    210,379.54x = 22,133,662,219.94
  5. Step 5: Solve for x
    x = 22,133,662,219.94/210,379.54
  6. Step 6: Final answer
    x = 105,208.25

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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.