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Finding the Fourth Proportional to 118,790.98, 163,931.55 and 71,044.33

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Solution

The fourth proportional to 118,790.98, 163,931.55 and 71,044.33 is: 98,041.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,790.98 : 163,931.55 = 71,044.33 : x
  2. Step 2: Convert to fraction form
    118,790.98/163,931.55 = 71,044.33/x
  3. Step 3: Cross multiply
    118,790.98x = 163,931.55 × 71,044.33
  4. Step 4: Simplify right side
    118,790.98x = 11,646,407,135.61
  5. Step 5: Solve for x
    x = 11,646,407,135.61/118,790.98
  6. Step 6: Final answer
    x = 98,041.17

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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.