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Finding the Fourth Proportional to 79,841.64, 119,727.84 and 42,393.60

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Solution

The fourth proportional to 79,841.64, 119,727.84 and 42,393.60 is: 63,572.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,841.64 : 119,727.84 = 42,393.60 : x
  2. Step 2: Convert to fraction form
    79,841.64/119,727.84 = 42,393.60/x
  3. Step 3: Cross multiply
    79,841.64x = 119,727.84 × 42,393.60
  4. Step 4: Simplify right side
    79,841.64x = 5,075,694,157.82
  5. Step 5: Solve for x
    x = 5,075,694,157.82/79,841.64
  6. Step 6: Final answer
    x = 63,572.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.