Home / 85,381.45-117,921.55-66,488.50

Finding the Fourth Proportional to 85,381.45, 117,921.55 and 66,488.50

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Solution

The fourth proportional to 85,381.45, 117,921.55 and 66,488.50 is: 91,828.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,381.45 : 117,921.55 = 66,488.50 : x
  2. Step 2: Convert to fraction form
    85,381.45/117,921.55 = 66,488.50/x
  3. Step 3: Cross multiply
    85,381.45x = 117,921.55 × 66,488.50
  4. Step 4: Simplify right side
    85,381.45x = 7,840,426,977.18
  5. Step 5: Solve for x
    x = 7,840,426,977.18/85,381.45
  6. Step 6: Final answer
    x = 91,828.22

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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.