Home / 85,126.98-117,422.01-61,215.78

Finding the Fourth Proportional to 85,126.98, 117,422.01 and 61,215.78

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Solution

The fourth proportional to 85,126.98, 117,422.01 and 61,215.78 is: 84,439.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,126.98 : 117,422.01 = 61,215.78 : x
  2. Step 2: Convert to fraction form
    85,126.98/117,422.01 = 61,215.78/x
  3. Step 3: Cross multiply
    85,126.98x = 117,422.01 × 61,215.78
  4. Step 4: Simplify right side
    85,126.98x = 7,188,079,931.32
  5. Step 5: Solve for x
    x = 7,188,079,931.32/85,126.98
  6. Step 6: Final answer
    x = 84,439.50

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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.