Home / 71,968.08-99,316.20-40,143.60

Finding the Fourth Proportional to 71,968.08, 99,316.20 and 40,143.60

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Solution

The fourth proportional to 71,968.08, 99,316.20 and 40,143.60 is: 55,398.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,968.08 : 99,316.20 = 40,143.60 : x
  2. Step 2: Convert to fraction form
    71,968.08/99,316.20 = 40,143.60/x
  3. Step 3: Cross multiply
    71,968.08x = 99,316.20 × 40,143.60
  4. Step 4: Simplify right side
    71,968.08x = 3,986,909,806.32
  5. Step 5: Solve for x
    x = 3,986,909,806.32/71,968.08
  6. Step 6: Final answer
    x = 55,398.31

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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.