Home / 123,202,929-169,992,860.80-72,942,190.79

Finding the Fourth Proportional to 123,202,929, 169,992,860.80 and 72,942,190.79

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Solution

The fourth proportional to 123,202,929, 169,992,860.80 and 72,942,190.79 is: 100,644,130.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,202,929 : 169,992,860.80 = 72,942,190.79 : x
  2. Step 2: Convert to fraction form
    123,202,929/169,992,860.80 = 72,942,190.79/x
  3. Step 3: Cross multiply
    123,202,929x = 169,992,860.80 × 72,942,190.79
  4. Step 4: Simplify right side
    123,202,929x = 12,399,651,685,411,514
  5. Step 5: Solve for x
    x = 12,399,651,685,411,514/123,202,929
  6. Step 6: Final answer
    x = 100,644,130.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.