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Finding the Fourth Proportional to 340,178.74, 510,212.18 and 126,890.88

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Solution

The fourth proportional to 340,178.74, 510,212.18 and 126,890.88 is: 190,315.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,178.74 : 510,212.18 = 126,890.88 : x
  2. Step 2: Convert to fraction form
    340,178.74/510,212.18 = 126,890.88/x
  3. Step 3: Cross multiply
    340,178.74x = 510,212.18 × 126,890.88
  4. Step 4: Simplify right side
    340,178.74x = 64,741,271,810.50
  5. Step 5: Solve for x
    x = 64,741,271,810.50/340,178.74
  6. Step 6: Final answer
    x = 190,315.46

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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.