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Finding the Fourth Proportional to 139,953,852.52, 193,174,731.06 and 81,235,434.88

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Solution

The fourth proportional to 139,953,852.52, 193,174,731.06 and 81,235,434.88 is: 112,127,197.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,953,852.52 : 193,174,731.06 = 81,235,434.88 : x
  2. Step 2: Convert to fraction form
    139,953,852.52/193,174,731.06 = 81,235,434.88/x
  3. Step 3: Cross multiply
    139,953,852.52x = 193,174,731.06 × 81,235,434.88
  4. Step 4: Simplify right side
    139,953,852.52x = 15,692,633,285,422,592
  5. Step 5: Solve for x
    x = 15,692,633,285,422,592/139,953,852.52
  6. Step 6: Final answer
    x = 112,127,197.67

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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.