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Finding the Fourth Proportional to 291,293.51, 436,940.13 and 80,931.38

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Solution

The fourth proportional to 291,293.51, 436,940.13 and 80,931.38 is: 121,397.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,293.51 : 436,940.13 = 80,931.38 : x
  2. Step 2: Convert to fraction form
    291,293.51/436,940.13 = 80,931.38/x
  3. Step 3: Cross multiply
    291,293.51x = 436,940.13 × 80,931.38
  4. Step 4: Simplify right side
    291,293.51x = 35,362,167,698.28
  5. Step 5: Solve for x
    x = 35,362,167,698.28/291,293.51
  6. Step 6: Final answer
    x = 121,397.03

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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.