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Finding the Fourth Proportional to 235,916.16, 353,558.61 and 86,015.40

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Solution

The fourth proportional to 235,916.16, 353,558.61 and 86,015.40 is: 128,908.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,916.16 : 353,558.61 = 86,015.40 : x
  2. Step 2: Convert to fraction form
    235,916.16/353,558.61 = 86,015.40/x
  3. Step 3: Cross multiply
    235,916.16x = 353,558.61 × 86,015.40
  4. Step 4: Simplify right side
    235,916.16x = 30,411,485,262.59
  5. Step 5: Solve for x
    x = 30,411,485,262.59/235,916.16
  6. Step 6: Final answer
    x = 128,908.02

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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.