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Finding the Fourth Proportional to 99,201.90, 136,891.50 and 56,169

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Solution

The fourth proportional to 99,201.90, 136,891.50 and 56,169 is: 77,509.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,201.90 : 136,891.50 = 56,169 : x
  2. Step 2: Convert to fraction form
    99,201.90/136,891.50 = 56,169/x
  3. Step 3: Cross multiply
    99,201.90x = 136,891.50 × 56,169
  4. Step 4: Simplify right side
    99,201.90x = 7,689,058,663.50
  5. Step 5: Solve for x
    x = 7,689,058,663.50/99,201.90
  6. Step 6: Final answer
    x = 77,509.19

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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.