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Finding the Fourth Proportional to 79,870.56, 119,805.83 and 74,999.01

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Solution

The fourth proportional to 79,870.56, 119,805.83 and 74,999.01 is: 112,498.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,870.56 : 119,805.83 = 74,999.01 : x
  2. Step 2: Convert to fraction form
    79,870.56/119,805.83 = 74,999.01/x
  3. Step 3: Cross multiply
    79,870.56x = 119,805.83 × 74,999.01
  4. Step 4: Simplify right side
    79,870.56x = 8,985,319,419.62
  5. Step 5: Solve for x
    x = 8,985,319,419.62/79,870.56
  6. Step 6: Final answer
    x = 112,498.52

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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.