Home / 137,519,309-189,803,604.84-78,821,316.42

Finding the Fourth Proportional to 137,519,309, 189,803,604.84 and 78,821,316.42

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Solution

The fourth proportional to 137,519,309, 189,803,604.84 and 78,821,316.42 is: 108,788,868.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,519,309 : 189,803,604.84 = 78,821,316.42 : x
  2. Step 2: Convert to fraction form
    137,519,309/189,803,604.84 = 78,821,316.42/x
  3. Step 3: Cross multiply
    137,519,309x = 189,803,604.84 × 78,821,316.42
  4. Step 4: Simplify right side
    137,519,309x = 14,960,569,994,750,284
  5. Step 5: Solve for x
    x = 14,960,569,994,750,284/137,519,309
  6. Step 6: Final answer
    x = 108,788,868.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.