Home / 81,228.57-121,547.61-67,056.81

Finding the Fourth Proportional to 81,228.57, 121,547.61 and 67,056.81

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Solution

The fourth proportional to 81,228.57, 121,547.61 and 67,056.81 is: 100,341.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,228.57 : 121,547.61 = 67,056.81 : x
  2. Step 2: Convert to fraction form
    81,228.57/121,547.61 = 67,056.81/x
  3. Step 3: Cross multiply
    81,228.57x = 121,547.61 × 67,056.81
  4. Step 4: Simplify right side
    81,228.57x = 8,150,594,989.72
  5. Step 5: Solve for x
    x = 8,150,594,989.72/81,228.57
  6. Step 6: Final answer
    x = 100,341.48

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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.