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Finding the Fourth Proportional to 78,610.62, 108,479.26 and 42,800.76

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Solution

The fourth proportional to 78,610.62, 108,479.26 and 42,800.76 is: 59,063.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,610.62 : 108,479.26 = 42,800.76 : x
  2. Step 2: Convert to fraction form
    78,610.62/108,479.26 = 42,800.76/x
  3. Step 3: Cross multiply
    78,610.62x = 108,479.26 × 42,800.76
  4. Step 4: Simplify right side
    78,610.62x = 4,642,994,772.24
  5. Step 5: Solve for x
    x = 4,642,994,772.24/78,610.62
  6. Step 6: Final answer
    x = 59,063.20

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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.