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Finding the Fourth Proportional to 72,170.97, 99,598.98 and 40,339.84

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Solution

The fourth proportional to 72,170.97, 99,598.98 and 40,339.84 is: 55,670.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,170.97 : 99,598.98 = 40,339.84 : x
  2. Step 2: Convert to fraction form
    72,170.97/99,598.98 = 40,339.84/x
  3. Step 3: Cross multiply
    72,170.97x = 99,598.98 × 40,339.84
  4. Step 4: Simplify right side
    72,170.97x = 4,017,806,917.36
  5. Step 5: Solve for x
    x = 4,017,806,917.36/72,170.97
  6. Step 6: Final answer
    x = 55,670.68

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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.