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Finding the Fourth Proportional to 131,737, 181,797.06 and 72,121

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Solution

The fourth proportional to 131,737, 181,797.06 and 72,121 is: 99,526.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,737 : 181,797.06 = 72,121 : x
  2. Step 2: Convert to fraction form
    131,737/181,797.06 = 72,121/x
  3. Step 3: Cross multiply
    131,737x = 181,797.06 × 72,121
  4. Step 4: Simplify right side
    131,737x = 13,111,385,764.26
  5. Step 5: Solve for x
    x = 13,111,385,764.26/131,737
  6. Step 6: Final answer
    x = 99,526.98

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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.