Home / 81,476.46-121,657.30-72,988.17

Finding the Fourth Proportional to 81,476.46, 121,657.30 and 72,988.17

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Solution

The fourth proportional to 81,476.46, 121,657.30 and 72,988.17 is: 108,982.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,476.46 : 121,657.30 = 72,988.17 : x
  2. Step 2: Convert to fraction form
    81,476.46/121,657.30 = 72,988.17/x
  3. Step 3: Cross multiply
    81,476.46x = 121,657.30 × 72,988.17
  4. Step 4: Simplify right side
    81,476.46x = 8,879,543,055.46
  5. Step 5: Solve for x
    x = 8,879,543,055.46/81,476.46
  6. Step 6: Final answer
    x = 108,982.93

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.