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Finding the Fourth Proportional to 76,431.36, 105,246.72 and 70,855.68

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Solution

The fourth proportional to 76,431.36, 105,246.72 and 70,855.68 is: 97,568.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,431.36 : 105,246.72 = 70,855.68 : x
  2. Step 2: Convert to fraction form
    76,431.36/105,246.72 = 70,855.68/x
  3. Step 3: Cross multiply
    76,431.36x = 105,246.72 × 70,855.68
  4. Step 4: Simplify right side
    76,431.36x = 7,457,327,913.37
  5. Step 5: Solve for x
    x = 7,457,327,913.37/76,431.36
  6. Step 6: Final answer
    x = 97,568.95

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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.