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Finding the Fourth Proportional to 71,457.60, 98,611.52 and 39,626.88

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Solution

The fourth proportional to 71,457.60, 98,611.52 and 39,626.88 is: 54,685.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,457.60 : 98,611.52 = 39,626.88 : x
  2. Step 2: Convert to fraction form
    71,457.60/98,611.52 = 39,626.88/x
  3. Step 3: Cross multiply
    71,457.60x = 98,611.52 × 39,626.88
  4. Step 4: Simplify right side
    71,457.60x = 3,907,666,869.66
  5. Step 5: Solve for x
    x = 3,907,666,869.66/71,457.60
  6. Step 6: Final answer
    x = 54,685.11

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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.