Home / 71,219.10-98,280.66-39,387.30

Finding the Fourth Proportional to 71,219.10, 98,280.66 and 39,387.30

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Solution

The fourth proportional to 71,219.10, 98,280.66 and 39,387.30 is: 54,353.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,219.10 : 98,280.66 = 39,387.30 : x
  2. Step 2: Convert to fraction form
    71,219.10/98,280.66 = 39,387.30/x
  3. Step 3: Cross multiply
    71,219.10x = 98,280.66 × 39,387.30
  4. Step 4: Simplify right side
    71,219.10x = 3,871,009,839.62
  5. Step 5: Solve for x
    x = 3,871,009,839.62/71,219.10
  6. Step 6: Final answer
    x = 54,353.53

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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.