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Finding the Fourth Proportional to 121,256.60, 181,884.90 and 115,813.40

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Solution

The fourth proportional to 121,256.60, 181,884.90 and 115,813.40 is: 173,720.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,256.60 : 181,884.90 = 115,813.40 : x
  2. Step 2: Convert to fraction form
    121,256.60/181,884.90 = 115,813.40/x
  3. Step 3: Cross multiply
    121,256.60x = 181,884.90 × 115,813.40
  4. Step 4: Simplify right side
    121,256.60x = 21,064,708,677.66
  5. Step 5: Solve for x
    x = 21,064,708,677.66/121,256.60
  6. Step 6: Final answer
    x = 173,720.10

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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.