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Finding the Fourth Proportional to 78,840.82, 108,801.65 and 45,314.42

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Solution

The fourth proportional to 78,840.82, 108,801.65 and 45,314.42 is: 62,534.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,840.82 : 108,801.65 = 45,314.42 : x
  2. Step 2: Convert to fraction form
    78,840.82/108,801.65 = 45,314.42/x
  3. Step 3: Cross multiply
    78,840.82x = 108,801.65 × 45,314.42
  4. Step 4: Simplify right side
    78,840.82x = 4,930,283,664.79
  5. Step 5: Solve for x
    x = 4,930,283,664.79/78,840.82
  6. Step 6: Final answer
    x = 62,534.66

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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.