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Finding the Fourth Proportional to 78,333.76, 108,100.71 and 42,523.78

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Solution

The fourth proportional to 78,333.76, 108,100.71 and 42,523.78 is: 58,682.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,333.76 : 108,100.71 = 42,523.78 : x
  2. Step 2: Convert to fraction form
    78,333.76/108,100.71 = 42,523.78/x
  3. Step 3: Cross multiply
    78,333.76x = 108,100.71 × 42,523.78
  4. Step 4: Simplify right side
    78,333.76x = 4,596,850,809.88
  5. Step 5: Solve for x
    x = 4,596,850,809.88/78,333.76
  6. Step 6: Final answer
    x = 58,682.88

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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.