Home / 209,781,339.80-314,672,009.70-128,152,002.20

Finding the Fourth Proportional to 209,781,339.80, 314,672,009.70 and 128,152,002.20

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Solution

The fourth proportional to 209,781,339.80, 314,672,009.70 and 128,152,002.20 is: 192,228,003.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,781,339.80 : 314,672,009.70 = 128,152,002.20 : x
  2. Step 2: Convert to fraction form
    209,781,339.80/314,672,009.70 = 128,152,002.20/x
  3. Step 3: Cross multiply
    209,781,339.80x = 314,672,009.70 × 128,152,002.20
  4. Step 4: Simplify right side
    209,781,339.80x = 40,325,848,079,352,824
  5. Step 5: Solve for x
    x = 40,325,848,079,352,824/209,781,339.80
  6. Step 6: Final answer
    x = 192,228,003.30

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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.