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Finding the Fourth Proportional to 72,955.51, 100,687.20 and 40,695.21

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Solution

The fourth proportional to 72,955.51, 100,687.20 and 40,695.21 is: 56,164.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,955.51 : 100,687.20 = 40,695.21 : x
  2. Step 2: Convert to fraction form
    72,955.51/100,687.20 = 40,695.21/x
  3. Step 3: Cross multiply
    72,955.51x = 100,687.20 × 40,695.21
  4. Step 4: Simplify right side
    72,955.51x = 4,097,486,824.62
  5. Step 5: Solve for x
    x = 4,097,486,824.62/72,955.51
  6. Step 6: Final answer
    x = 56,164.19

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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.