Home / 81,123.84-121,692.16-28,545.12

Finding the Fourth Proportional to 81,123.84, 121,692.16 and 28,545.12

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Solution

The fourth proportional to 81,123.84, 121,692.16 and 28,545.12 is: 42,819.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,123.84 : 121,692.16 = 28,545.12 : x
  2. Step 2: Convert to fraction form
    81,123.84/121,692.16 = 28,545.12/x
  3. Step 3: Cross multiply
    81,123.84x = 121,692.16 × 28,545.12
  4. Step 4: Simplify right side
    81,123.84x = 3,473,717,310.26
  5. Step 5: Solve for x
    x = 3,473,717,310.26/81,123.84
  6. Step 6: Final answer
    x = 42,819.93

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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.