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Finding the Fourth Proportional to 83,323.38, 124,985.07 and 20,998.74

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Solution

The fourth proportional to 83,323.38, 124,985.07 and 20,998.74 is: 31,498.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,323.38 : 124,985.07 = 20,998.74 : x
  2. Step 2: Convert to fraction form
    83,323.38/124,985.07 = 20,998.74/x
  3. Step 3: Cross multiply
    83,323.38x = 124,985.07 × 20,998.74
  4. Step 4: Simplify right side
    83,323.38x = 2,624,528,988.81
  5. Step 5: Solve for x
    x = 2,624,528,988.81/83,323.38
  6. Step 6: Final answer
    x = 31,498.11

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Similar ratio
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1.5x scale

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.