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Finding the Fourth Proportional to 81,887.56, 112,934.55 and 56,435.13

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Solution

The fourth proportional to 81,887.56, 112,934.55 and 56,435.13 is: 77,832.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,887.56 : 112,934.55 = 56,435.13 : x
  2. Step 2: Convert to fraction form
    81,887.56/112,934.55 = 56,435.13/x
  3. Step 3: Cross multiply
    81,887.56x = 112,934.55 × 56,435.13
  4. Step 4: Simplify right side
    81,887.56x = 6,373,476,222.37
  5. Step 5: Solve for x
    x = 6,373,476,222.37/81,887.56
  6. Step 6: Final answer
    x = 77,832.05

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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.