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Finding the Fourth Proportional to 78,335.60, 108,103.20 and 42,525.60

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Solution

The fourth proportional to 78,335.60, 108,103.20 and 42,525.60 is: 58,685.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,335.60 : 108,103.20 = 42,525.60 : x
  2. Step 2: Convert to fraction form
    78,335.60/108,103.20 = 42,525.60/x
  3. Step 3: Cross multiply
    78,335.60x = 108,103.20 × 42,525.60
  4. Step 4: Simplify right side
    78,335.60x = 4,597,153,441.92
  5. Step 5: Solve for x
    x = 4,597,153,441.92/78,335.60
  6. Step 6: Final answer
    x = 58,685.37

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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.