Home / 78,516.60-108,343.07-53,078.31

Finding the Fourth Proportional to 78,516.60, 108,343.07 and 53,078.31

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Solution

The fourth proportional to 78,516.60, 108,343.07 and 53,078.31 is: 73,241.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,516.60 : 108,343.07 = 53,078.31 : x
  2. Step 2: Convert to fraction form
    78,516.60/108,343.07 = 53,078.31/x
  3. Step 3: Cross multiply
    78,516.60x = 108,343.07 × 53,078.31
  4. Step 4: Simplify right side
    78,516.60x = 5,750,666,989.46
  5. Step 5: Solve for x
    x = 5,750,666,989.46/78,516.60
  6. Step 6: Final answer
    x = 73,241.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.