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Finding the Fourth Proportional to 125,813.05, 173,531.16 and 72,078.46

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Solution

The fourth proportional to 125,813.05, 173,531.16 and 72,078.46 is: 99,416.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,813.05 : 173,531.16 = 72,078.46 : x
  2. Step 2: Convert to fraction form
    125,813.05/173,531.16 = 72,078.46/x
  3. Step 3: Cross multiply
    125,813.05x = 173,531.16 × 72,078.46
  4. Step 4: Simplify right side
    125,813.05x = 12,507,858,340.99
  5. Step 5: Solve for x
    x = 12,507,858,340.99/125,813.05
  6. Step 6: Final answer
    x = 99,416.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.