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Finding the Fourth Proportional to 71,395.60, 106,963.80 and 58,176.40

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Solution

The fourth proportional to 71,395.60, 106,963.80 and 58,176.40 is: 87,159.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,395.60 : 106,963.80 = 58,176.40 : x
  2. Step 2: Convert to fraction form
    71,395.60/106,963.80 = 58,176.40/x
  3. Step 3: Cross multiply
    71,395.60x = 106,963.80 × 58,176.40
  4. Step 4: Simplify right side
    71,395.60x = 6,222,768,814.32
  5. Step 5: Solve for x
    x = 6,222,768,814.32/71,395.60
  6. Step 6: Final answer
    x = 87,159.00

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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.