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Finding the Fourth Proportional to 125,261, 172,950.90 and 80,626.76

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Solution

The fourth proportional to 125,261, 172,950.90 and 80,626.76 is: 111,323.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,261 : 172,950.90 = 80,626.76 : x
  2. Step 2: Convert to fraction form
    125,261/172,950.90 = 80,626.76/x
  3. Step 3: Cross multiply
    125,261x = 172,950.90 × 80,626.76
  4. Step 4: Simplify right side
    125,261x = 13,944,470,706.08
  5. Step 5: Solve for x
    x = 13,944,470,706.08/125,261
  6. Step 6: Final answer
    x = 111,323.32

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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.