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Finding the Fourth Proportional to 230,693.40, 345,975.30 and 72,970.20

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Solution

The fourth proportional to 230,693.40, 345,975.30 and 72,970.20 is: 109,434.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,693.40 : 345,975.30 = 72,970.20 : x
  2. Step 2: Convert to fraction form
    230,693.40/345,975.30 = 72,970.20/x
  3. Step 3: Cross multiply
    230,693.40x = 345,975.30 × 72,970.20
  4. Step 4: Simplify right side
    230,693.40x = 25,245,886,836.06
  5. Step 5: Solve for x
    x = 25,245,886,836.06/230,693.40
  6. Step 6: Final answer
    x = 109,434.80

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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.