Home / 139,535,030.80-209,302,546.20-85,787,318.80

Finding the Fourth Proportional to 139,535,030.80, 209,302,546.20 and 85,787,318.80

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Solution

The fourth proportional to 139,535,030.80, 209,302,546.20 and 85,787,318.80 is: 128,680,978.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,535,030.80 : 209,302,546.20 = 85,787,318.80 : x
  2. Step 2: Convert to fraction form
    139,535,030.80/209,302,546.20 = 85,787,318.80/x
  3. Step 3: Cross multiply
    139,535,030.80x = 209,302,546.20 × 85,787,318.80
  4. Step 4: Simplify right side
    139,535,030.80x = 17,955,504,256,511,126
  5. Step 5: Solve for x
    x = 17,955,504,256,511,126/139,535,030.80
  6. Step 6: Final answer
    x = 128,680,978.20

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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.