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Finding the Fourth Proportional to 78,580.77, 108,443.80 and 48,383.51

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Solution

The fourth proportional to 78,580.77, 108,443.80 and 48,383.51 is: 66,770.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,580.77 : 108,443.80 = 48,383.51 : x
  2. Step 2: Convert to fraction form
    78,580.77/108,443.80 = 48,383.51/x
  3. Step 3: Cross multiply
    78,580.77x = 108,443.80 × 48,383.51
  4. Step 4: Simplify right side
    78,580.77x = 5,246,890,897.60
  5. Step 5: Solve for x
    x = 5,246,890,897.60/78,580.77
  6. Step 6: Final answer
    x = 66,770.68

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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.