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Finding the Fourth Proportional to 71,485.80, 98,656.26 and 39,657.96

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Solution

The fourth proportional to 71,485.80, 98,656.26 and 39,657.96 is: 54,731.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,485.80 : 98,656.26 = 39,657.96 : x
  2. Step 2: Convert to fraction form
    71,485.80/98,656.26 = 39,657.96/x
  3. Step 3: Cross multiply
    71,485.80x = 98,656.26 × 39,657.96
  4. Step 4: Simplify right side
    71,485.80x = 3,912,506,012.83
  5. Step 5: Solve for x
    x = 3,912,506,012.83/71,485.80
  6. Step 6: Final answer
    x = 54,731.23

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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.