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Finding the Fourth Proportional to 210,379.79, 315,572.48 and 70,138.46

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Solution

The fourth proportional to 210,379.79, 315,572.48 and 70,138.46 is: 105,208.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,379.79 : 315,572.48 = 70,138.46 : x
  2. Step 2: Convert to fraction form
    210,379.79/315,572.48 = 70,138.46/x
  3. Step 3: Cross multiply
    210,379.79x = 315,572.48 × 70,138.46
  4. Step 4: Simplify right side
    210,379.79x = 22,133,767,765.58
  5. Step 5: Solve for x
    x = 22,133,767,765.58/210,379.79
  6. Step 6: Final answer
    x = 105,208.62

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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.