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Finding the Fourth Proportional to 213,087.79, 319,683.75 and 70,932.79

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Solution

The fourth proportional to 213,087.79, 319,683.75 and 70,932.79 is: 106,416.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,087.79 : 319,683.75 = 70,932.79 : x
  2. Step 2: Convert to fraction form
    213,087.79/319,683.75 = 70,932.79/x
  3. Step 3: Cross multiply
    213,087.79x = 319,683.75 × 70,932.79
  4. Step 4: Simplify right side
    213,087.79x = 22,676,059,328.62
  5. Step 5: Solve for x
    x = 22,676,059,328.62/213,087.79
  6. Step 6: Final answer
    x = 106,416.51

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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.