Home / 85,129.12-117,480.08-47,406.88

Finding the Fourth Proportional to 85,129.12, 117,480.08 and 47,406.88

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Solution

The fourth proportional to 85,129.12, 117,480.08 and 47,406.88 is: 65,422.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,129.12 : 117,480.08 = 47,406.88 : x
  2. Step 2: Convert to fraction form
    85,129.12/117,480.08 = 47,406.88/x
  3. Step 3: Cross multiply
    85,129.12x = 117,480.08 × 47,406.88
  4. Step 4: Simplify right side
    85,129.12x = 5,569,364,054.95
  5. Step 5: Solve for x
    x = 5,569,364,054.95/85,129.12
  6. Step 6: Final answer
    x = 65,422.55

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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.