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Finding the Fourth Proportional to 291,071.51, 436,576.55 and 77,860.94

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Solution

The fourth proportional to 291,071.51, 436,576.55 and 77,860.94 is: 116,783.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,071.51 : 436,576.55 = 77,860.94 : x
  2. Step 2: Convert to fraction form
    291,071.51/436,576.55 = 77,860.94/x
  3. Step 3: Cross multiply
    291,071.51x = 436,576.55 × 77,860.94
  4. Step 4: Simplify right side
    291,071.51x = 33,992,257,992.77
  5. Step 5: Solve for x
    x = 33,992,257,992.77/291,071.51
  6. Step 6: Final answer
    x = 116,783.19

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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.