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Finding the Fourth Proportional to 81,325.68, 112,028.91 and 69,187.29

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Solution

The fourth proportional to 81,325.68, 112,028.91 and 69,187.29 is: 95,307.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,325.68 : 112,028.91 = 69,187.29 : x
  2. Step 2: Convert to fraction form
    81,325.68/112,028.91 = 69,187.29/x
  3. Step 3: Cross multiply
    81,325.68x = 112,028.91 × 69,187.29
  4. Step 4: Simplify right side
    81,325.68x = 7,750,976,192.34
  5. Step 5: Solve for x
    x = 7,750,976,192.34/81,325.68
  6. Step 6: Final answer
    x = 95,307.85

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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.