Home / 428,079.67-642,068.44-112,561.18

Finding the Fourth Proportional to 428,079.67, 642,068.44 and 112,561.18

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Solution

The fourth proportional to 428,079.67, 642,068.44 and 112,561.18 is: 168,828.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,079.67 : 642,068.44 = 112,561.18 : x
  2. Step 2: Convert to fraction form
    428,079.67/642,068.44 = 112,561.18/x
  3. Step 3: Cross multiply
    428,079.67x = 642,068.44 × 112,561.18
  4. Step 4: Simplify right side
    428,079.67x = 72,271,979,360.59
  5. Step 5: Solve for x
    x = 72,271,979,360.59/428,079.67
  6. Step 6: Final answer
    x = 168,828.34

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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.