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Finding the Fourth Proportional to 86,202,328.80, 120,985,591.20 and 86,202,328.80

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Solution

The fourth proportional to 86,202,328.80, 120,985,591.20 and 86,202,328.80 is: 120,985,591.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,202,328.80 : 120,985,591.20 = 86,202,328.80 : x
  2. Step 2: Convert to fraction form
    86,202,328.80/120,985,591.20 = 86,202,328.80/x
  3. Step 3: Cross multiply
    86,202,328.80x = 120,985,591.20 × 86,202,328.80
  4. Step 4: Simplify right side
    86,202,328.80x = 10,429,239,712,684,786
  5. Step 5: Solve for x
    x = 10,429,239,712,684,786/86,202,328.80
  6. Step 6: Final answer
    x = 120,985,591.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.