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Finding the Fourth Proportional to 79,687.12, 109,964.13 and 43,870.24

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Solution

The fourth proportional to 79,687.12, 109,964.13 and 43,870.24 is: 60,538.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,687.12 : 109,964.13 = 43,870.24 : x
  2. Step 2: Convert to fraction form
    79,687.12/109,964.13 = 43,870.24/x
  3. Step 3: Cross multiply
    79,687.12x = 109,964.13 × 43,870.24
  4. Step 4: Simplify right side
    79,687.12x = 4,824,152,774.49
  5. Step 5: Solve for x
    x = 4,824,152,774.49/79,687.12
  6. Step 6: Final answer
    x = 60,538.68

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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.