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Finding the Fourth Proportional to 139,968,339.60, 209,952,509.40 and 49,080,118.80

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Solution

The fourth proportional to 139,968,339.60, 209,952,509.40 and 49,080,118.80 is: 73,620,178.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,339.60 : 209,952,509.40 = 49,080,118.80 : x
  2. Step 2: Convert to fraction form
    139,968,339.60/209,952,509.40 = 49,080,118.80/x
  3. Step 3: Cross multiply
    139,968,339.60x = 209,952,509.40 × 49,080,118.80
  4. Step 4: Simplify right side
    139,968,339.60x = 10,304,494,103,710,116
  5. Step 5: Solve for x
    x = 10,304,494,103,710,116/139,968,339.60
  6. Step 6: Final answer
    x = 73,620,178.20

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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.