Home / 81,971.29-113,172.69-66,899.96

Finding the Fourth Proportional to 81,971.29, 113,172.69 and 66,899.96

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Solution

The fourth proportional to 81,971.29, 113,172.69 and 66,899.96 is: 92,364.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,971.29 : 113,172.69 = 66,899.96 : x
  2. Step 2: Convert to fraction form
    81,971.29/113,172.69 = 66,899.96/x
  3. Step 3: Cross multiply
    81,971.29x = 113,172.69 × 66,899.96
  4. Step 4: Simplify right side
    81,971.29x = 7,571,248,543.50
  5. Step 5: Solve for x
    x = 7,571,248,543.50/81,971.29
  6. Step 6: Final answer
    x = 92,364.64

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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.