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Finding the Fourth Proportional to 78,827.95, 108,782.96 and 43,018.71

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Solution

The fourth proportional to 78,827.95, 108,782.96 and 43,018.71 is: 59,366.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,827.95 : 108,782.96 = 43,018.71 : x
  2. Step 2: Convert to fraction form
    78,827.95/108,782.96 = 43,018.71/x
  3. Step 3: Cross multiply
    78,827.95x = 108,782.96 × 43,018.71
  4. Step 4: Simplify right side
    78,827.95x = 4,679,702,609.18
  5. Step 5: Solve for x
    x = 4,679,702,609.18/78,827.95
  6. Step 6: Final answer
    x = 59,366.03

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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.