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Finding the Fourth Proportional to 215,861, 297,888.18 and 126,437

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Solution

The fourth proportional to 215,861, 297,888.18 and 126,437 is: 174,483.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,861 : 297,888.18 = 126,437 : x
  2. Step 2: Convert to fraction form
    215,861/297,888.18 = 126,437/x
  3. Step 3: Cross multiply
    215,861x = 297,888.18 × 126,437
  4. Step 4: Simplify right side
    215,861x = 37,664,087,814.66
  5. Step 5: Solve for x
    x = 37,664,087,814.66/215,861
  6. Step 6: Final answer
    x = 174,483.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.