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Finding the Fourth Proportional to 121,538.70, 182,308.05 and 115,706.70

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Solution

The fourth proportional to 121,538.70, 182,308.05 and 115,706.70 is: 173,560.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,538.70 : 182,308.05 = 115,706.70 : x
  2. Step 2: Convert to fraction form
    121,538.70/182,308.05 = 115,706.70/x
  3. Step 3: Cross multiply
    121,538.70x = 182,308.05 × 115,706.70
  4. Step 4: Simplify right side
    121,538.70x = 21,094,262,848.94
  5. Step 5: Solve for x
    x = 21,094,262,848.94/121,538.70
  6. Step 6: Final answer
    x = 173,560.05

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1.5x scale

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.