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Finding the Fourth Proportional to 210,608.53, 315,968.19 and 75,686.23

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Solution

The fourth proportional to 210,608.53, 315,968.19 and 75,686.23 is: 113,549.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,608.53 : 315,968.19 = 75,686.23 : x
  2. Step 2: Convert to fraction form
    210,608.53/315,968.19 = 75,686.23/x
  3. Step 3: Cross multiply
    210,608.53x = 315,968.19 × 75,686.23
  4. Step 4: Simplify right side
    210,608.53x = 23,914,441,101.02
  5. Step 5: Solve for x
    x = 23,914,441,101.02/210,608.53
  6. Step 6: Final answer
    x = 113,549.25

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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.