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Finding the Fourth Proportional to 83,205.40, 124,808.10 and 51,712.60

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Solution

The fourth proportional to 83,205.40, 124,808.10 and 51,712.60 is: 77,568.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,205.40 : 124,808.10 = 51,712.60 : x
  2. Step 2: Convert to fraction form
    83,205.40/124,808.10 = 51,712.60/x
  3. Step 3: Cross multiply
    83,205.40x = 124,808.10 × 51,712.60
  4. Step 4: Simplify right side
    83,205.40x = 6,454,151,352.06
  5. Step 5: Solve for x
    x = 6,454,151,352.06/83,205.40
  6. Step 6: Final answer
    x = 77,568.90

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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.