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Finding the Fourth Proportional to 210,041.60, 315,091.20 and 69,785.60

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Solution

The fourth proportional to 210,041.60, 315,091.20 and 69,785.60 is: 104,687.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,041.60 : 315,091.20 = 69,785.60 : x
  2. Step 2: Convert to fraction form
    210,041.60/315,091.20 = 69,785.60/x
  3. Step 3: Cross multiply
    210,041.60x = 315,091.20 × 69,785.60
  4. Step 4: Simplify right side
    210,041.60x = 21,988,828,446.72
  5. Step 5: Solve for x
    x = 21,988,828,446.72/210,041.60
  6. Step 6: Final answer
    x = 104,687.97

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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.