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Finding the Fourth Proportional to 79,690.83, 109,971.13 and 43,392.90

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Solution

The fourth proportional to 79,690.83, 109,971.13 and 43,392.90 is: 59,881.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,690.83 : 109,971.13 = 43,392.90 : x
  2. Step 2: Convert to fraction form
    79,690.83/109,971.13 = 43,392.90/x
  3. Step 3: Cross multiply
    79,690.83x = 109,971.13 × 43,392.90
  4. Step 4: Simplify right side
    79,690.83x = 4,771,966,246.98
  5. Step 5: Solve for x
    x = 4,771,966,246.98/79,690.83
  6. Step 6: Final answer
    x = 59,881.00

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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.