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Finding the Fourth Proportional to 309,363,813.87, 426,912,289.88 and 170,134,145.07

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Solution

The fourth proportional to 309,363,813.87, 426,912,289.88 and 170,134,145.07 is: 234,779,745.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,363,813.87 : 426,912,289.88 = 170,134,145.07 : x
  2. Step 2: Convert to fraction form
    309,363,813.87/426,912,289.88 = 170,134,145.07/x
  3. Step 3: Cross multiply
    309,363,813.87x = 426,912,289.88 × 170,134,145.07
  4. Step 4: Simplify right side
    309,363,813.87x = 72,632,357,457,759,136
  5. Step 5: Solve for x
    x = 72,632,357,457,759,136/309,363,813.87
  6. Step 6: Final answer
    x = 234,779,745.40

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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.