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Finding the Fourth Proportional to 81,185.40, 112,070.40 and 49,364.52

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Solution

The fourth proportional to 81,185.40, 112,070.40 and 49,364.52 is: 68,144.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,185.40 : 112,070.40 = 49,364.52 : x
  2. Step 2: Convert to fraction form
    81,185.40/112,070.40 = 49,364.52/x
  3. Step 3: Cross multiply
    81,185.40x = 112,070.40 × 49,364.52
  4. Step 4: Simplify right side
    81,185.40x = 5,532,301,502.21
  5. Step 5: Solve for x
    x = 5,532,301,502.21/81,185.40
  6. Step 6: Final answer
    x = 68,144.04

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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.