Home / 78,724,883.50-118,086,903.78-20,432,518.87

Finding the Fourth Proportional to 78,724,883.50, 118,086,903.78 and 20,432,518.87

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Solution

The fourth proportional to 78,724,883.50, 118,086,903.78 and 20,432,518.87 is: 30,648,668.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,724,883.50 : 118,086,903.78 = 20,432,518.87 : x
  2. Step 2: Convert to fraction form
    78,724,883.50/118,086,903.78 = 20,432,518.87/x
  3. Step 3: Cross multiply
    78,724,883.50x = 118,086,903.78 × 20,432,518.87
  4. Step 4: Simplify right side
    78,724,883.50x = 2,412,812,889,784,724.50
  5. Step 5: Solve for x
    x = 2,412,812,889,784,724.50/78,724,883.50
  6. Step 6: Final answer
    x = 30,648,668.92

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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.