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Finding the Fourth Proportional to 121,259.70, 181,889.55 and 91,735.20

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Solution

The fourth proportional to 121,259.70, 181,889.55 and 91,735.20 is: 137,602.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,259.70 : 181,889.55 = 91,735.20 : x
  2. Step 2: Convert to fraction form
    121,259.70/181,889.55 = 91,735.20/x
  3. Step 3: Cross multiply
    121,259.70x = 181,889.55 × 91,735.20
  4. Step 4: Simplify right side
    121,259.70x = 16,685,674,247.16
  5. Step 5: Solve for x
    x = 16,685,674,247.16/121,259.70
  6. Step 6: Final answer
    x = 137,602.80

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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.