Home / 428,055.51-642,034.67-112,537.02

Finding the Fourth Proportional to 428,055.51, 642,034.67 and 112,537.02

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Solution

The fourth proportional to 428,055.51, 642,034.67 and 112,537.02 is: 168,792.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,055.51 : 642,034.67 = 112,537.02 : x
  2. Step 2: Convert to fraction form
    428,055.51/642,034.67 = 112,537.02/x
  3. Step 3: Cross multiply
    428,055.51x = 642,034.67 × 112,537.02
  4. Step 4: Simplify right side
    428,055.51x = 72,252,667,935.80
  5. Step 5: Solve for x
    x = 72,252,667,935.80/428,055.51
  6. Step 6: Final answer
    x = 168,792.75

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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.