Home / 139,969,295.20-209,953,942.80-42,939,978.40

Finding the Fourth Proportional to 139,969,295.20, 209,953,942.80 and 42,939,978.40

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Solution

The fourth proportional to 139,969,295.20, 209,953,942.80 and 42,939,978.40 is: 64,409,967.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,969,295.20 : 209,953,942.80 = 42,939,978.40 : x
  2. Step 2: Convert to fraction form
    139,969,295.20/209,953,942.80 = 42,939,978.40/x
  3. Step 3: Cross multiply
    139,969,295.20x = 209,953,942.80 × 42,939,978.40
  4. Step 4: Simplify right side
    139,969,295.20x = 9,015,417,768,826,836
  5. Step 5: Solve for x
    x = 9,015,417,768,826,836/139,969,295.20
  6. Step 6: Final answer
    x = 64,409,967.60

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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.