Home / 427,631.76-641,398.32-112,113.72

Finding the Fourth Proportional to 427,631.76, 641,398.32 and 112,113.72

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Solution

The fourth proportional to 427,631.76, 641,398.32 and 112,113.72 is: 168,157.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,631.76 : 641,398.32 = 112,113.72 : x
  2. Step 2: Convert to fraction form
    427,631.76/641,398.32 = 112,113.72/x
  3. Step 3: Cross multiply
    427,631.76x = 641,398.32 × 112,113.72
  4. Step 4: Simplify right side
    427,631.76x = 71,909,551,656.95
  5. Step 5: Solve for x
    x = 71,909,551,656.95/427,631.76
  6. Step 6: Final answer
    x = 168,157.65

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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.