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Finding the Fourth Proportional to 139,409,352.80, 209,114,029.20 and 48,502,728.80

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Solution

The fourth proportional to 139,409,352.80, 209,114,029.20 and 48,502,728.80 is: 72,754,093.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,409,352.80 : 209,114,029.20 = 48,502,728.80 : x
  2. Step 2: Convert to fraction form
    139,409,352.80/209,114,029.20 = 48,502,728.80/x
  3. Step 3: Cross multiply
    139,409,352.80x = 209,114,029.20 × 48,502,728.80
  4. Step 4: Simplify right side
    139,409,352.80x = 10,142,601,046,562,880
  5. Step 5: Solve for x
    x = 10,142,601,046,562,880/139,409,352.80
  6. Step 6: Final answer
    x = 72,754,093.20

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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.