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Finding the Fourth Proportional to 251,713.80, 377,570.70 and 139,739.40

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Solution

The fourth proportional to 251,713.80, 377,570.70 and 139,739.40 is: 209,609.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,713.80 : 377,570.70 = 139,739.40 : x
  2. Step 2: Convert to fraction form
    251,713.80/377,570.70 = 139,739.40/x
  3. Step 3: Cross multiply
    251,713.80x = 377,570.70 × 139,739.40
  4. Step 4: Simplify right side
    251,713.80x = 52,761,503,075.58
  5. Step 5: Solve for x
    x = 52,761,503,075.58/251,713.80
  6. Step 6: Final answer
    x = 209,609.10

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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.