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Finding the Fourth Proportional to 70,211.70, 105,317.55 and 57,745.80

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Solution

The fourth proportional to 70,211.70, 105,317.55 and 57,745.80 is: 86,618.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,211.70 : 105,317.55 = 57,745.80 : x
  2. Step 2: Convert to fraction form
    70,211.70/105,317.55 = 57,745.80/x
  3. Step 3: Cross multiply
    70,211.70x = 105,317.55 × 57,745.80
  4. Step 4: Simplify right side
    70,211.70x = 6,081,646,178.79
  5. Step 5: Solve for x
    x = 6,081,646,178.79/70,211.70
  6. Step 6: Final answer
    x = 86,618.70

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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.