Home / 253,181.90-349,384.10-140,000.78

Finding the Fourth Proportional to 253,181.90, 349,384.10 and 140,000.78

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Solution

The fourth proportional to 253,181.90, 349,384.10 and 140,000.78 is: 193,197.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,181.90 : 349,384.10 = 140,000.78 : x
  2. Step 2: Convert to fraction form
    253,181.90/349,384.10 = 140,000.78/x
  3. Step 3: Cross multiply
    253,181.90x = 349,384.10 × 140,000.78
  4. Step 4: Simplify right side
    253,181.90x = 48,914,046,519.60
  5. Step 5: Solve for x
    x = 48,914,046,519.60/253,181.90
  6. Step 6: Final answer
    x = 193,197.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.