Home / 81,585.72-112,378.51-57,671.28

Finding the Fourth Proportional to 81,585.72, 112,378.51 and 57,671.28

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Solution

The fourth proportional to 81,585.72, 112,378.51 and 57,671.28 is: 79,438.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,585.72 : 112,378.51 = 57,671.28 : x
  2. Step 2: Convert to fraction form
    81,585.72/112,378.51 = 57,671.28/x
  3. Step 3: Cross multiply
    81,585.72x = 112,378.51 × 57,671.28
  4. Step 4: Simplify right side
    81,585.72x = 6,481,012,516.19
  5. Step 5: Solve for x
    x = 6,481,012,516.19/81,585.72
  6. Step 6: Final answer
    x = 79,438.07

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1.5x scale

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.