Home / 128,382,989.72-177,168,525.83-73,380,027.20

Finding the Fourth Proportional to 128,382,989.72, 177,168,525.83 and 73,380,027.20

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Solution

The fourth proportional to 128,382,989.72, 177,168,525.83 and 73,380,027.20 is: 101,264,437.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,382,989.72 : 177,168,525.83 = 73,380,027.20 : x
  2. Step 2: Convert to fraction form
    128,382,989.72/177,168,525.83 = 73,380,027.20/x
  3. Step 3: Cross multiply
    128,382,989.72x = 177,168,525.83 × 73,380,027.20
  4. Step 4: Simplify right side
    128,382,989.72x = 13,000,631,244,076,118
  5. Step 5: Solve for x
    x = 13,000,631,244,076,118/128,382,989.72
  6. Step 6: Final answer
    x = 101,264,437.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.