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Finding the Fourth Proportional to 99,879,602.90, 149,819,404.35 and 51,289,711.70

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Solution

The fourth proportional to 99,879,602.90, 149,819,404.35 and 51,289,711.70 is: 76,934,567.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,879,602.90 : 149,819,404.35 = 51,289,711.70 : x
  2. Step 2: Convert to fraction form
    99,879,602.90/149,819,404.35 = 51,289,711.70/x
  3. Step 3: Cross multiply
    99,879,602.90x = 149,819,404.35 × 51,289,711.70
  4. Step 4: Simplify right side
    99,879,602.90x = 7,684,194,056,177,226
  5. Step 5: Solve for x
    x = 7,684,194,056,177,226/99,879,602.90
  6. Step 6: Final answer
    x = 76,934,567.55

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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.