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Finding the Fourth Proportional to 138,714,798.24, 191,353,844.88 and 85,774,580.64

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Solution

The fourth proportional to 138,714,798.24, 191,353,844.88 and 85,774,580.64 is: 118,324,043.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,714,798.24 : 191,353,844.88 = 85,774,580.64 : x
  2. Step 2: Convert to fraction form
    138,714,798.24/191,353,844.88 = 85,774,580.64/x
  3. Step 3: Cross multiply
    138,714,798.24x = 191,353,844.88 × 85,774,580.64
  4. Step 4: Simplify right side
    138,714,798.24x = 16,413,295,798,433,610
  5. Step 5: Solve for x
    x = 16,413,295,798,433,610/138,714,798.24
  6. Step 6: Final answer
    x = 118,324,043.34

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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.