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Finding the Fourth Proportional to 291,185.64, 436,780.86 and 91,501.56

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Solution

The fourth proportional to 291,185.64, 436,780.86 and 91,501.56 is: 137,253.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,185.64 : 436,780.86 = 91,501.56 : x
  2. Step 2: Convert to fraction form
    291,185.64/436,780.86 = 91,501.56/x
  3. Step 3: Cross multiply
    291,185.64x = 436,780.86 × 91,501.56
  4. Step 4: Simplify right side
    291,185.64x = 39,966,130,068.14
  5. Step 5: Solve for x
    x = 39,966,130,068.14/291,185.64
  6. Step 6: Final answer
    x = 137,253.09

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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.