Home / 81,117.74-121,730.86-28,527.02

Finding the Fourth Proportional to 81,117.74, 121,730.86 and 28,527.02

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Solution

The fourth proportional to 81,117.74, 121,730.86 and 28,527.02 is: 42,809.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,117.74 : 121,730.86 = 28,527.02 : x
  2. Step 2: Convert to fraction form
    81,117.74/121,730.86 = 28,527.02/x
  3. Step 3: Cross multiply
    81,117.74x = 121,730.86 × 28,527.02
  4. Step 4: Simplify right side
    81,117.74x = 3,472,618,677.84
  5. Step 5: Solve for x
    x = 3,472,618,677.84/81,117.74
  6. Step 6: Final answer
    x = 42,809.61

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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.