Home / 81,128.80-121,693.20-58,837.60

Finding the Fourth Proportional to 81,128.80, 121,693.20 and 58,837.60

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Solution

The fourth proportional to 81,128.80, 121,693.20 and 58,837.60 is: 88,256.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,128.80 : 121,693.20 = 58,837.60 : x
  2. Step 2: Convert to fraction form
    81,128.80/121,693.20 = 58,837.60/x
  3. Step 3: Cross multiply
    81,128.80x = 121,693.20 × 58,837.60
  4. Step 4: Simplify right side
    81,128.80x = 7,160,135,824.32
  5. Step 5: Solve for x
    x = 7,160,135,824.32/81,128.80
  6. Step 6: Final answer
    x = 88,256.40

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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.