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Finding the Fourth Proportional to 118,211.74, 163,080.75 and 77,873.74

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Solution

The fourth proportional to 118,211.74, 163,080.75 and 77,873.74 is: 107,431.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,211.74 : 163,080.75 = 77,873.74 : x
  2. Step 2: Convert to fraction form
    118,211.74/163,080.75 = 77,873.74/x
  3. Step 3: Cross multiply
    118,211.74x = 163,080.75 × 77,873.74
  4. Step 4: Simplify right side
    118,211.74x = 12,699,707,924.51
  5. Step 5: Solve for x
    x = 12,699,707,924.51/118,211.74
  6. Step 6: Final answer
    x = 107,431.87

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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.