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Finding the Fourth Proportional to 81,737.51, 122,596.95 and 28,419.26

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Solution

The fourth proportional to 81,737.51, 122,596.95 and 28,419.26 is: 42,625.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,737.51 : 122,596.95 = 28,419.26 : x
  2. Step 2: Convert to fraction form
    81,737.51/122,596.95 = 28,419.26/x
  3. Step 3: Cross multiply
    81,737.51x = 122,596.95 × 28,419.26
  4. Step 4: Simplify right side
    81,737.51x = 3,484,114,597.26
  5. Step 5: Solve for x
    x = 3,484,114,597.26/81,737.51
  6. Step 6: Final answer
    x = 42,625.65

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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.