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Finding the Fourth Proportional to 210,485.56, 315,763.22 and 70,287.16

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Solution

The fourth proportional to 210,485.56, 315,763.22 and 70,287.16 is: 105,442.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,485.56 : 315,763.22 = 70,287.16 : x
  2. Step 2: Convert to fraction form
    210,485.56/315,763.22 = 70,287.16/x
  3. Step 3: Cross multiply
    210,485.56x = 315,763.22 × 70,287.16
  4. Step 4: Simplify right side
    210,485.56x = 22,194,099,966.26
  5. Step 5: Solve for x
    x = 22,194,099,966.26/210,485.56
  6. Step 6: Final answer
    x = 105,442.39

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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.