Home / 81,428.64-112,364.40-45,613.92

Finding the Fourth Proportional to 81,428.64, 112,364.40 and 45,613.92

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Solution

The fourth proportional to 81,428.64, 112,364.40 and 45,613.92 is: 62,943.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,428.64 : 112,364.40 = 45,613.92 : x
  2. Step 2: Convert to fraction form
    81,428.64/112,364.40 = 45,613.92/x
  3. Step 3: Cross multiply
    81,428.64x = 112,364.40 × 45,613.92
  4. Step 4: Simplify right side
    81,428.64x = 5,125,380,752.45
  5. Step 5: Solve for x
    x = 5,125,380,752.45/81,428.64
  6. Step 6: Final answer
    x = 62,943.22

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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.