Home / 78,288,800.40-117,433,200.60-74,509,664.40

Finding the Fourth Proportional to 78,288,800.40, 117,433,200.60 and 74,509,664.40

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Solution

The fourth proportional to 78,288,800.40, 117,433,200.60 and 74,509,664.40 is: 111,764,496.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,288,800.40 : 117,433,200.60 = 74,509,664.40 : x
  2. Step 2: Convert to fraction form
    78,288,800.40/117,433,200.60 = 74,509,664.40/x
  3. Step 3: Cross multiply
    78,288,800.40x = 117,433,200.60 × 74,509,664.40
  4. Step 4: Simplify right side
    78,288,800.40x = 8,749,908,366,123,879
  5. Step 5: Solve for x
    x = 8,749,908,366,123,879/78,288,800.40
  6. Step 6: Final answer
    x = 111,764,496.60

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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.