Home / 78,762,004.80-118,143,007.20-21,254,183.70

Finding the Fourth Proportional to 78,762,004.80, 118,143,007.20 and 21,254,183.70

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Solution

The fourth proportional to 78,762,004.80, 118,143,007.20 and 21,254,183.70 is: 31,881,275.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,762,004.80 : 118,143,007.20 = 21,254,183.70 : x
  2. Step 2: Convert to fraction form
    78,762,004.80/118,143,007.20 = 21,254,183.70/x
  3. Step 3: Cross multiply
    78,762,004.80x = 118,143,007.20 × 21,254,183.70
  4. Step 4: Simplify right side
    78,762,004.80x = 2,511,033,177,899,222.50
  5. Step 5: Solve for x
    x = 2,511,033,177,899,222.50/78,762,004.80
  6. Step 6: Final answer
    x = 31,881,275.55

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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.