Home / 136,821.60-205,232.40-77,772.60

Finding the Fourth Proportional to 136,821.60, 205,232.40 and 77,772.60

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Solution

The fourth proportional to 136,821.60, 205,232.40 and 77,772.60 is: 116,658.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,821.60 : 205,232.40 = 77,772.60 : x
  2. Step 2: Convert to fraction form
    136,821.60/205,232.40 = 77,772.60/x
  3. Step 3: Cross multiply
    136,821.60x = 205,232.40 × 77,772.60
  4. Step 4: Simplify right side
    136,821.60x = 15,961,457,352.24
  5. Step 5: Solve for x
    x = 15,961,457,352.24/136,821.60
  6. Step 6: Final answer
    x = 116,658.90

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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.