Home / 136,972.57-205,505.01-86,312.77

Finding the Fourth Proportional to 136,972.57, 205,505.01 and 86,312.77

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Solution

The fourth proportional to 136,972.57, 205,505.01 and 86,312.77 is: 129,498.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,972.57 : 205,505.01 = 86,312.77 : x
  2. Step 2: Convert to fraction form
    136,972.57/205,505.01 = 86,312.77/x
  3. Step 3: Cross multiply
    136,972.57x = 205,505.01 × 86,312.77
  4. Step 4: Simplify right side
    136,972.57x = 17,737,706,661.98
  5. Step 5: Solve for x
    x = 17,737,706,661.98/136,972.57
  6. Step 6: Final answer
    x = 129,498.24

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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.