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Finding the Fourth Proportional to 139,968,305.60, 209,952,458.40 and 49,080,084.80

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Solution

The fourth proportional to 139,968,305.60, 209,952,458.40 and 49,080,084.80 is: 73,620,127.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,305.60 : 209,952,458.40 = 49,080,084.80 : x
  2. Step 2: Convert to fraction form
    139,968,305.60/209,952,458.40 = 49,080,084.80/x
  3. Step 3: Cross multiply
    139,968,305.60x = 209,952,458.40 × 49,080,084.80
  4. Step 4: Simplify right side
    139,968,305.60x = 10,304,484,462,240,472
  5. Step 5: Solve for x
    x = 10,304,484,462,240,472/139,968,305.60
  6. Step 6: Final answer
    x = 73,620,127.20

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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.