Home / 205,343,219.72-307,807,567.54-128,720,056.32

Finding the Fourth Proportional to 205,343,219.72, 307,807,567.54 and 128,720,056.32

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Solution

The fourth proportional to 205,343,219.72, 307,807,567.54 and 128,720,056.32 is: 192,950,161.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,343,219.72 : 307,807,567.54 = 128,720,056.32 : x
  2. Step 2: Convert to fraction form
    205,343,219.72/307,807,567.54 = 128,720,056.32/x
  3. Step 3: Cross multiply
    205,343,219.72x = 307,807,567.54 × 128,720,056.32
  4. Step 4: Simplify right side
    205,343,219.72x = 39,621,007,429,471,008
  5. Step 5: Solve for x
    x = 39,621,007,429,471,008/205,343,219.72
  6. Step 6: Final answer
    x = 192,950,161.61

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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.