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Finding the Fourth Proportional to 12,102,072.80, 16,985,417.20 and 12,102,072.80

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Solution

The fourth proportional to 12,102,072.80, 16,985,417.20 and 12,102,072.80 is: 16,985,417.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,102,072.80 : 16,985,417.20 = 12,102,072.80 : x
  2. Step 2: Convert to fraction form
    12,102,072.80/16,985,417.20 = 12,102,072.80/x
  3. Step 3: Cross multiply
    12,102,072.80x = 16,985,417.20 × 12,102,072.80
  4. Step 4: Simplify right side
    12,102,072.80x = 205,558,755,492,772.16
  5. Step 5: Solve for x
    x = 205,558,755,492,772.16/12,102,072.80
  6. Step 6: Final answer
    x = 16,985,417.20

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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.