Home / 137,549,650.69-189,820,085.21-78,811,136.65

Finding the Fourth Proportional to 137,549,650.69, 189,820,085.21 and 78,811,136.65

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Solution

The fourth proportional to 137,549,650.69, 189,820,085.21 and 78,811,136.65 is: 108,760,266.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,549,650.69 : 189,820,085.21 = 78,811,136.65 : x
  2. Step 2: Convert to fraction form
    137,549,650.69/189,820,085.21 = 78,811,136.65/x
  3. Step 3: Cross multiply
    137,549,650.69x = 189,820,085.21 × 78,811,136.65
  4. Step 4: Simplify right side
    137,549,650.69x = 14,959,936,674,399,956
  5. Step 5: Solve for x
    x = 14,959,936,674,399,956/137,549,650.69
  6. Step 6: Final answer
    x = 108,760,266.56

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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.