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Finding the Fourth Proportional to 81,466.56, 112,389.12 and 56,272.32

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Solution

The fourth proportional to 81,466.56, 112,389.12 and 56,272.32 is: 77,631.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,466.56 : 112,389.12 = 56,272.32 : x
  2. Step 2: Convert to fraction form
    81,466.56/112,389.12 = 56,272.32/x
  3. Step 3: Cross multiply
    81,466.56x = 112,389.12 × 56,272.32
  4. Step 4: Simplify right side
    81,466.56x = 6,324,396,525.16
  5. Step 5: Solve for x
    x = 6,324,396,525.16/81,466.56
  6. Step 6: Final answer
    x = 77,631.81

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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.