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Finding the Fourth Proportional to 121,900.74, 168,326.85 and 76,654.44

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Solution

The fourth proportional to 121,900.74, 168,326.85 and 76,654.44 is: 105,848.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,900.74 : 168,326.85 = 76,654.44 : x
  2. Step 2: Convert to fraction form
    121,900.74/168,326.85 = 76,654.44/x
  3. Step 3: Cross multiply
    121,900.74x = 168,326.85 × 76,654.44
  4. Step 4: Simplify right side
    121,900.74x = 12,903,000,423.71
  5. Step 5: Solve for x
    x = 12,903,000,423.71/121,900.74
  6. Step 6: Final answer
    x = 105,848.42

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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.