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Finding the Fourth Proportional to 71,378.85, 98,503.63 and 39,113.55

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Solution

The fourth proportional to 71,378.85, 98,503.63 and 39,113.55 is: 53,977.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,378.85 : 98,503.63 = 39,113.55 : x
  2. Step 2: Convert to fraction form
    71,378.85/98,503.63 = 39,113.55/x
  3. Step 3: Cross multiply
    71,378.85x = 98,503.63 × 39,113.55
  4. Step 4: Simplify right side
    71,378.85x = 3,852,826,559.40
  5. Step 5: Solve for x
    x = 3,852,826,559.40/71,378.85
  6. Step 6: Final answer
    x = 53,977.14

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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.