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Finding the Fourth Proportional to 291,674.71, 437,536.77 and 81,312.85

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Solution

The fourth proportional to 291,674.71, 437,536.77 and 81,312.85 is: 121,976.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,674.71 : 437,536.77 = 81,312.85 : x
  2. Step 2: Convert to fraction form
    291,674.71/437,536.77 = 81,312.85/x
  3. Step 3: Cross multiply
    291,674.71x = 437,536.77 × 81,312.85
  4. Step 4: Simplify right side
    291,674.71x = 35,577,361,748.49
  5. Step 5: Solve for x
    x = 35,577,361,748.49/291,674.71
  6. Step 6: Final answer
    x = 121,976.16

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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.