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Finding the Fourth Proportional to 78,637.34, 108,520.09 and 42,826.64

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Solution

The fourth proportional to 78,637.34, 108,520.09 and 42,826.64 is: 59,101.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,637.34 : 108,520.09 = 42,826.64 : x
  2. Step 2: Convert to fraction form
    78,637.34/108,520.09 = 42,826.64/x
  3. Step 3: Cross multiply
    78,637.34x = 108,520.09 × 42,826.64
  4. Step 4: Simplify right side
    78,637.34x = 4,647,550,177.53
  5. Step 5: Solve for x
    x = 4,647,550,177.53/78,637.34
  6. Step 6: Final answer
    x = 59,101.06

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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.