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Finding the Fourth Proportional to 210,021.60, 315,061.20 and 69,765.60

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Solution

The fourth proportional to 210,021.60, 315,061.20 and 69,765.60 is: 104,657.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,021.60 : 315,061.20 = 69,765.60 : x
  2. Step 2: Convert to fraction form
    210,021.60/315,061.20 = 69,765.60/x
  3. Step 3: Cross multiply
    210,021.60x = 315,061.20 × 69,765.60
  4. Step 4: Simplify right side
    210,021.60x = 21,980,433,654.72
  5. Step 5: Solve for x
    x = 21,980,433,654.72/210,021.60
  6. Step 6: Final answer
    x = 104,657.97

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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.