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Finding the Fourth Proportional to 79,690.73, 109,973.52 and 47,860.16

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Solution

The fourth proportional to 79,690.73, 109,973.52 and 47,860.16 is: 66,047.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,690.73 : 109,973.52 = 47,860.16 : x
  2. Step 2: Convert to fraction form
    79,690.73/109,973.52 = 47,860.16/x
  3. Step 3: Cross multiply
    79,690.73x = 109,973.52 × 47,860.16
  4. Step 4: Simplify right side
    79,690.73x = 5,263,349,713.10
  5. Step 5: Solve for x
    x = 5,263,349,713.10/79,690.73
  6. Step 6: Final answer
    x = 66,047.21

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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.