Home / 72,985.20-100,719.36-39,451.20

Finding the Fourth Proportional to 72,985.20, 100,719.36 and 39,451.20

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Solution

The fourth proportional to 72,985.20, 100,719.36 and 39,451.20 is: 54,442.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,985.20 : 100,719.36 = 39,451.20 : x
  2. Step 2: Convert to fraction form
    72,985.20/100,719.36 = 39,451.20/x
  3. Step 3: Cross multiply
    72,985.20x = 100,719.36 × 39,451.20
  4. Step 4: Simplify right side
    72,985.20x = 3,973,499,615.23
  5. Step 5: Solve for x
    x = 3,973,499,615.23/72,985.20
  6. Step 6: Final answer
    x = 54,442.54

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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.