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Finding the Fourth Proportional to 213,344.51, 319,909.61 and 71,139.44

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Solution

The fourth proportional to 213,344.51, 319,909.61 and 71,139.44 is: 106,673.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,344.51 : 319,909.61 = 71,139.44 : x
  2. Step 2: Convert to fraction form
    213,344.51/319,909.61 = 71,139.44/x
  3. Step 3: Cross multiply
    213,344.51x = 319,909.61 × 71,139.44
  4. Step 4: Simplify right side
    213,344.51x = 22,758,191,483.64
  5. Step 5: Solve for x
    x = 22,758,191,483.64/213,344.51
  6. Step 6: Final answer
    x = 106,673.44

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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.