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Finding the Fourth Proportional to 71,551.08, 98,740.80 and 39,720.06

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Solution

The fourth proportional to 71,551.08, 98,740.80 and 39,720.06 is: 54,813.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,551.08 : 98,740.80 = 39,720.06 : x
  2. Step 2: Convert to fraction form
    71,551.08/98,740.80 = 39,720.06/x
  3. Step 3: Cross multiply
    71,551.08x = 98,740.80 × 39,720.06
  4. Step 4: Simplify right side
    71,551.08x = 3,921,990,500.45
  5. Step 5: Solve for x
    x = 3,921,990,500.45/71,551.08
  6. Step 6: Final answer
    x = 54,813.85

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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.