Home / 428,104.64-642,158.40-112,535.04

Finding the Fourth Proportional to 428,104.64, 642,158.40 and 112,535.04

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Solution

The fourth proportional to 428,104.64, 642,158.40 and 112,535.04 is: 168,802.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,104.64 : 642,158.40 = 112,535.04 : x
  2. Step 2: Convert to fraction form
    428,104.64/642,158.40 = 112,535.04/x
  3. Step 3: Cross multiply
    428,104.64x = 642,158.40 × 112,535.04
  4. Step 4: Simplify right side
    428,104.64x = 72,265,321,230.34
  5. Step 5: Solve for x
    x = 72,265,321,230.34/428,104.64
  6. Step 6: Final answer
    x = 168,802.94

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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.