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Finding the Fourth Proportional to 121,204.70, 181,807.05 and 85,775.30

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Solution

The fourth proportional to 121,204.70, 181,807.05 and 85,775.30 is: 128,662.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,204.70 : 181,807.05 = 85,775.30 : x
  2. Step 2: Convert to fraction form
    121,204.70/181,807.05 = 85,775.30/x
  3. Step 3: Cross multiply
    121,204.70x = 181,807.05 × 85,775.30
  4. Step 4: Simplify right side
    121,204.70x = 15,594,554,255.87
  5. Step 5: Solve for x
    x = 15,594,554,255.87/121,204.70
  6. Step 6: Final answer
    x = 128,662.95

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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.