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Finding the Fourth Proportional to 212,693.80, 319,040.70 and 119,187.40

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Solution

The fourth proportional to 212,693.80, 319,040.70 and 119,187.40 is: 178,781.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,693.80 : 319,040.70 = 119,187.40 : x
  2. Step 2: Convert to fraction form
    212,693.80/319,040.70 = 119,187.40/x
  3. Step 3: Cross multiply
    212,693.80x = 319,040.70 × 119,187.40
  4. Step 4: Simplify right side
    212,693.80x = 38,025,631,527.18
  5. Step 5: Solve for x
    x = 38,025,631,527.18/212,693.80
  6. Step 6: Final answer
    x = 178,781.10

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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.