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Finding the Fourth Proportional to 139,969,210.80, 209,953,816.20 and 88,698,932.40

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Solution

The fourth proportional to 139,969,210.80, 209,953,816.20 and 88,698,932.40 is: 133,048,398.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,969,210.80 : 209,953,816.20 = 88,698,932.40 : x
  2. Step 2: Convert to fraction form
    139,969,210.80/209,953,816.20 = 88,698,932.40/x
  3. Step 3: Cross multiply
    139,969,210.80x = 209,953,816.20 × 88,698,932.40
  4. Step 4: Simplify right side
    139,969,210.80x = 18,622,679,350,245,824
  5. Step 5: Solve for x
    x = 18,622,679,350,245,824/139,969,210.80
  6. Step 6: Final answer
    x = 133,048,398.60

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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.