Home / 81,345.64-111,918.18-71,743.72

Finding the Fourth Proportional to 81,345.64, 111,918.18 and 71,743.72

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Solution

The fourth proportional to 81,345.64, 111,918.18 and 71,743.72 is: 98,707.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,345.64 : 111,918.18 = 71,743.72 : x
  2. Step 2: Convert to fraction form
    81,345.64/111,918.18 = 71,743.72/x
  3. Step 3: Cross multiply
    81,345.64x = 111,918.18 × 71,743.72
  4. Step 4: Simplify right side
    81,345.64x = 8,029,426,568.83
  5. Step 5: Solve for x
    x = 8,029,426,568.83/81,345.64
  6. Step 6: Final answer
    x = 98,707.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.