Home / 81,062.40-121,665.60-47,740.80

Finding the Fourth Proportional to 81,062.40, 121,665.60 and 47,740.80

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Solution

The fourth proportional to 81,062.40, 121,665.60 and 47,740.80 is: 71,653.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,062.40 : 121,665.60 = 47,740.80 : x
  2. Step 2: Convert to fraction form
    81,062.40/121,665.60 = 47,740.80/x
  3. Step 3: Cross multiply
    81,062.40x = 121,665.60 × 47,740.80
  4. Step 4: Simplify right side
    81,062.40x = 5,808,413,076.48
  5. Step 5: Solve for x
    x = 5,808,413,076.48/81,062.40
  6. Step 6: Final answer
    x = 71,653.60

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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.