Home / 207,981.30-311,971.95-83,411.70

Finding the Fourth Proportional to 207,981.30, 311,971.95 and 83,411.70

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Solution

The fourth proportional to 207,981.30, 311,971.95 and 83,411.70 is: 125,117.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,981.30 : 311,971.95 = 83,411.70 : x
  2. Step 2: Convert to fraction form
    207,981.30/311,971.95 = 83,411.70/x
  3. Step 3: Cross multiply
    207,981.30x = 311,971.95 × 83,411.70
  4. Step 4: Simplify right side
    207,981.30x = 26,022,110,701.82
  5. Step 5: Solve for x
    x = 26,022,110,701.82/207,981.30
  6. Step 6: Final answer
    x = 125,117.55

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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.