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Finding the Fourth Proportional to 132,840.79, 183,317.92 and 72,411.96

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Solution

The fourth proportional to 132,840.79, 183,317.92 and 72,411.96 is: 99,927.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,840.79 : 183,317.92 = 72,411.96 : x
  2. Step 2: Convert to fraction form
    132,840.79/183,317.92 = 72,411.96/x
  3. Step 3: Cross multiply
    132,840.79x = 183,317.92 × 72,411.96
  4. Step 4: Simplify right side
    132,840.79x = 13,274,409,890.32
  5. Step 5: Solve for x
    x = 13,274,409,890.32/132,840.79
  6. Step 6: Final answer
    x = 99,927.21

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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.