Home / 208,218,912.15-312,435,312.53-91,715,905.83

Finding the Fourth Proportional to 208,218,912.15, 312,435,312.53 and 91,715,905.83

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Solution

The fourth proportional to 208,218,912.15, 312,435,312.53 and 91,715,905.83 is: 137,620,965.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,218,912.15 : 312,435,312.53 = 91,715,905.83 : x
  2. Step 2: Convert to fraction form
    208,218,912.15/312,435,312.53 = 91,715,905.83/x
  3. Step 3: Cross multiply
    208,218,912.15x = 312,435,312.53 × 91,715,905.83
  4. Step 4: Simplify right side
    208,218,912.15x = 28,655,287,701,509,516
  5. Step 5: Solve for x
    x = 28,655,287,701,509,516/208,218,912.15
  6. Step 6: Final answer
    x = 137,620,965.39

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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.