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Finding the Fourth Proportional to 85,210.60, 127,815.90 and 47,885.80

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Solution

The fourth proportional to 85,210.60, 127,815.90 and 47,885.80 is: 71,828.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,210.60 : 127,815.90 = 47,885.80 : x
  2. Step 2: Convert to fraction form
    85,210.60/127,815.90 = 47,885.80/x
  3. Step 3: Cross multiply
    85,210.60x = 127,815.90 × 47,885.80
  4. Step 4: Simplify right side
    85,210.60x = 6,120,566,624.22
  5. Step 5: Solve for x
    x = 6,120,566,624.22/85,210.60
  6. Step 6: Final answer
    x = 71,828.70

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.