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Finding the Fourth Proportional to 291,130.92, 436,693.95 and 80,768.88

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Solution

The fourth proportional to 291,130.92, 436,693.95 and 80,768.88 is: 121,152.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,130.92 : 436,693.95 = 80,768.88 : x
  2. Step 2: Convert to fraction form
    291,130.92/436,693.95 = 80,768.88/x
  3. Step 3: Cross multiply
    291,130.92x = 436,693.95 × 80,768.88
  4. Step 4: Simplify right side
    291,130.92x = 35,271,281,244.28
  5. Step 5: Solve for x
    x = 35,271,281,244.28/291,130.92
  6. Step 6: Final answer
    x = 121,152.65

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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.