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Finding the Fourth Proportional to 74,998.80, 112,498.20 and 30,602.70

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Solution

The fourth proportional to 74,998.80, 112,498.20 and 30,602.70 is: 45,904.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,998.80 : 112,498.20 = 30,602.70 : x
  2. Step 2: Convert to fraction form
    74,998.80/112,498.20 = 30,602.70/x
  3. Step 3: Cross multiply
    74,998.80x = 112,498.20 × 30,602.70
  4. Step 4: Simplify right side
    74,998.80x = 3,442,748,665.14
  5. Step 5: Solve for x
    x = 3,442,748,665.14/74,998.80
  6. Step 6: Final answer
    x = 45,904.05

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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.