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Finding the Fourth Proportional to 139,968,118.60, 209,952,177.90 and 111,057,728.20

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Solution

The fourth proportional to 139,968,118.60, 209,952,177.90 and 111,057,728.20 is: 166,586,592.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,118.60 : 209,952,177.90 = 111,057,728.20 : x
  2. Step 2: Convert to fraction form
    139,968,118.60/209,952,177.90 = 111,057,728.20/x
  3. Step 3: Cross multiply
    139,968,118.60x = 209,952,177.90 × 111,057,728.20
  4. Step 4: Simplify right side
    139,968,118.60x = 23,316,811,908,216,248
  5. Step 5: Solve for x
    x = 23,316,811,908,216,248/139,968,118.60
  6. Step 6: Final answer
    x = 166,586,592.30

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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.