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Finding the Fourth Proportional to 139,953,847.65, 193,174,724.33 and 81,235,430.01

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Solution

The fourth proportional to 139,953,847.65, 193,174,724.33 and 81,235,430.01 is: 112,127,190.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,953,847.65 : 193,174,724.33 = 81,235,430.01 : x
  2. Step 2: Convert to fraction form
    139,953,847.65/193,174,724.33 = 81,235,430.01/x
  3. Step 3: Cross multiply
    139,953,847.65x = 193,174,724.33 × 81,235,430.01
  4. Step 4: Simplify right side
    139,953,847.65x = 15,692,631,797,604,582
  5. Step 5: Solve for x
    x = 15,692,631,797,604,582/139,953,847.65
  6. Step 6: Final answer
    x = 112,127,190.94

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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.