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Finding the Fourth Proportional to 140,738.58, 211,125.15 and 45,978.30

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Solution

The fourth proportional to 140,738.58, 211,125.15 and 45,978.30 is: 68,973.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,738.58 : 211,125.15 = 45,978.30 : x
  2. Step 2: Convert to fraction form
    140,738.58/211,125.15 = 45,978.30/x
  3. Step 3: Cross multiply
    140,738.58x = 211,125.15 × 45,978.30
  4. Step 4: Simplify right side
    140,738.58x = 9,707,175,484.25
  5. Step 5: Solve for x
    x = 9,707,175,484.25/140,738.58
  6. Step 6: Final answer
    x = 68,973.10

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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.