Home / 71,643.42-98,865.90-39,811.50

Finding the Fourth Proportional to 71,643.42, 98,865.90 and 39,811.50

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Solution

The fourth proportional to 71,643.42, 98,865.90 and 39,811.50 is: 54,938.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,643.42 : 98,865.90 = 39,811.50 : x
  2. Step 2: Convert to fraction form
    71,643.42/98,865.90 = 39,811.50/x
  3. Step 3: Cross multiply
    71,643.42x = 98,865.90 × 39,811.50
  4. Step 4: Simplify right side
    71,643.42x = 3,935,999,777.85
  5. Step 5: Solve for x
    x = 3,935,999,777.85/71,643.42
  6. Step 6: Final answer
    x = 54,938.75

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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.