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Finding the Fourth Proportional to 121,145.60, 181,718.40 and 73,906.40

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Solution

The fourth proportional to 121,145.60, 181,718.40 and 73,906.40 is: 110,859.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,145.60 : 181,718.40 = 73,906.40 : x
  2. Step 2: Convert to fraction form
    121,145.60/181,718.40 = 73,906.40/x
  3. Step 3: Cross multiply
    121,145.60x = 181,718.40 × 73,906.40
  4. Step 4: Simplify right side
    121,145.60x = 13,430,152,757.76
  5. Step 5: Solve for x
    x = 13,430,152,757.76/121,145.60
  6. Step 6: Final answer
    x = 110,859.60

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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.