Home / 119,431.80-164,802.06-81,761.40

Finding the Fourth Proportional to 119,431.80, 164,802.06 and 81,761.40

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Solution

The fourth proportional to 119,431.80, 164,802.06 and 81,761.40 is: 112,821.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,431.80 : 164,802.06 = 81,761.40 : x
  2. Step 2: Convert to fraction form
    119,431.80/164,802.06 = 81,761.40/x
  3. Step 3: Cross multiply
    119,431.80x = 164,802.06 × 81,761.40
  4. Step 4: Simplify right side
    119,431.80x = 13,474,447,148.48
  5. Step 5: Solve for x
    x = 13,474,447,148.48/119,431.80
  6. Step 6: Final answer
    x = 112,821.27

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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.