Home / 72,189.31-108,302.45-30,055.39

Finding the Fourth Proportional to 72,189.31, 108,302.45 and 30,055.39

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Solution

The fourth proportional to 72,189.31, 108,302.45 and 30,055.39 is: 45,090.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,189.31 : 108,302.45 = 30,055.39 : x
  2. Step 2: Convert to fraction form
    72,189.31/108,302.45 = 30,055.39/x
  3. Step 3: Cross multiply
    72,189.31x = 108,302.45 × 30,055.39
  4. Step 4: Simplify right side
    72,189.31x = 3,255,072,372.71
  5. Step 5: Solve for x
    x = 3,255,072,372.71/72,189.31
  6. Step 6: Final answer
    x = 45,090.78

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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.