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Finding the Fourth Proportional to 121,970.90, 182,661.07 and 84,425.78

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Solution

The fourth proportional to 121,970.90, 182,661.07 and 84,425.78 is: 126,434.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,970.90 : 182,661.07 = 84,425.78 : x
  2. Step 2: Convert to fraction form
    121,970.90/182,661.07 = 84,425.78/x
  3. Step 3: Cross multiply
    121,970.90x = 182,661.07 × 84,425.78
  4. Step 4: Simplify right side
    121,970.90x = 15,421,303,310.38
  5. Step 5: Solve for x
    x = 15,421,303,310.38/121,970.90
  6. Step 6: Final answer
    x = 126,434.28

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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.