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Finding the Fourth Proportional to 216,866,890.16, 325,304,223.24 and 78,790,557.68

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Solution

The fourth proportional to 216,866,890.16, 325,304,223.24 and 78,790,557.68 is: 118,187,249.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,866,890.16 : 325,304,223.24 = 78,790,557.68 : x
  2. Step 2: Convert to fraction form
    216,866,890.16/325,304,223.24 = 78,790,557.68/x
  3. Step 3: Cross multiply
    216,866,890.16x = 325,304,223.24 × 78,790,557.68
  4. Step 4: Simplify right side
    216,866,890.16x = 25,630,901,164,738,820
  5. Step 5: Solve for x
    x = 25,630,901,164,738,820/216,866,890.16
  6. Step 6: Final answer
    x = 118,187,249.08

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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.