Home / 136,968.37-189,035.12-78,823.91

Finding the Fourth Proportional to 136,968.37, 189,035.12 and 78,823.91

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Solution

The fourth proportional to 136,968.37, 189,035.12 and 78,823.91 is: 108,787.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,968.37 : 189,035.12 = 78,823.91 : x
  2. Step 2: Convert to fraction form
    136,968.37/189,035.12 = 78,823.91/x
  3. Step 3: Cross multiply
    136,968.37x = 189,035.12 × 78,823.91
  4. Step 4: Simplify right side
    136,968.37x = 14,900,487,955.37
  5. Step 5: Solve for x
    x = 14,900,487,955.37/136,968.37
  6. Step 6: Final answer
    x = 108,787.80

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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.