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Finding the Fourth Proportional to 117,368.60, 176,031.30 and 72,915.80

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Solution

The fourth proportional to 117,368.60, 176,031.30 and 72,915.80 is: 109,360.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,368.60 : 176,031.30 = 72,915.80 : x
  2. Step 2: Convert to fraction form
    117,368.60/176,031.30 = 72,915.80/x
  3. Step 3: Cross multiply
    117,368.60x = 176,031.30 × 72,915.80
  4. Step 4: Simplify right side
    117,368.60x = 12,835,463,064.54
  5. Step 5: Solve for x
    x = 12,835,463,064.54/117,368.60
  6. Step 6: Final answer
    x = 109,360.28

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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.