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Finding the Fourth Proportional to 218,717.71, 301,830.45 and 118,115.71

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Solution

The fourth proportional to 218,717.71, 301,830.45 and 118,115.71 is: 162,999.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,717.71 : 301,830.45 = 118,115.71 : x
  2. Step 2: Convert to fraction form
    218,717.71/301,830.45 = 118,115.71/x
  3. Step 3: Cross multiply
    218,717.71x = 301,830.45 × 118,115.71
  4. Step 4: Simplify right side
    218,717.71x = 35,650,917,606.08
  5. Step 5: Solve for x
    x = 35,650,917,606.08/218,717.71
  6. Step 6: Final answer
    x = 162,999.68

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1.5x scale

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.