Home / 83,988.71-125,981.52-20,808.98

Finding the Fourth Proportional to 83,988.71, 125,981.52 and 20,808.98

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Solution

The fourth proportional to 83,988.71, 125,981.52 and 20,808.98 is: 31,213.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,988.71 : 125,981.52 = 20,808.98 : x
  2. Step 2: Convert to fraction form
    83,988.71/125,981.52 = 20,808.98/x
  3. Step 3: Cross multiply
    83,988.71x = 125,981.52 × 20,808.98
  4. Step 4: Simplify right side
    83,988.71x = 2,621,546,300.14
  5. Step 5: Solve for x
    x = 2,621,546,300.14/83,988.71
  6. Step 6: Final answer
    x = 31,213.08

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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.