Home / 80,746.40-121,141.20-57,418.40

Finding the Fourth Proportional to 80,746.40, 121,141.20 and 57,418.40

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Solution

The fourth proportional to 80,746.40, 121,141.20 and 57,418.40 is: 86,142.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,746.40 : 121,141.20 = 57,418.40 : x
  2. Step 2: Convert to fraction form
    80,746.40/121,141.20 = 57,418.40/x
  3. Step 3: Cross multiply
    80,746.40x = 121,141.20 × 57,418.40
  4. Step 4: Simplify right side
    80,746.40x = 6,955,733,878.08
  5. Step 5: Solve for x
    x = 6,955,733,878.08/80,746.40
  6. Step 6: Final answer
    x = 86,142.96

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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.