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Finding the Fourth Proportional to 28,798,689.60, 43,093,058.40 and 21,240,417.60

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Solution

The fourth proportional to 28,798,689.60, 43,093,058.40 and 21,240,417.60 is: 31,783,201.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,798,689.60 : 43,093,058.40 = 21,240,417.60 : x
  2. Step 2: Convert to fraction form
    28,798,689.60/43,093,058.40 = 21,240,417.60/x
  3. Step 3: Cross multiply
    28,798,689.60x = 43,093,058.40 × 21,240,417.60
  4. Step 4: Simplify right side
    28,798,689.60x = 915,314,556,077,187.88
  5. Step 5: Solve for x
    x = 915,314,556,077,187.88/28,798,689.60
  6. Step 6: Final answer
    x = 31,783,201.56

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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.