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Finding the Fourth Proportional to 139,969,206.80, 209,953,810.20 and 88,698,928.40

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Solution

The fourth proportional to 139,969,206.80, 209,953,810.20 and 88,698,928.40 is: 133,048,392.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,969,206.80 : 209,953,810.20 = 88,698,928.40 : x
  2. Step 2: Convert to fraction form
    139,969,206.80/209,953,810.20 = 88,698,928.40/x
  3. Step 3: Cross multiply
    139,969,206.80x = 209,953,810.20 × 88,698,928.40
  4. Step 4: Simplify right side
    139,969,206.80x = 18,622,677,978,236,988
  5. Step 5: Solve for x
    x = 18,622,677,978,236,988/139,969,206.80
  6. Step 6: Final answer
    x = 133,048,392.60

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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.