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Finding the Fourth Proportional to 81,505, 112,441.26 and 57,652.12

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Solution

The fourth proportional to 81,505, 112,441.26 and 57,652.12 is: 79,534.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,505 : 112,441.26 = 57,652.12 : x
  2. Step 2: Convert to fraction form
    81,505/112,441.26 = 57,652.12/x
  3. Step 3: Cross multiply
    81,505x = 112,441.26 × 57,652.12
  4. Step 4: Simplify right side
    81,505x = 6,482,477,014.47
  5. Step 5: Solve for x
    x = 6,482,477,014.47/81,505
  6. Step 6: Final answer
    x = 79,534.72

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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.