Home / 128,114.21-191,910.24-77,482.43

Finding the Fourth Proportional to 128,114.21, 191,910.24 and 77,482.43

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Solution

The fourth proportional to 128,114.21, 191,910.24 and 77,482.43 is: 116,065.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,114.21 : 191,910.24 = 77,482.43 : x
  2. Step 2: Convert to fraction form
    128,114.21/191,910.24 = 77,482.43/x
  3. Step 3: Cross multiply
    128,114.21x = 191,910.24 × 77,482.43
  4. Step 4: Simplify right side
    128,114.21x = 14,869,671,737.08
  5. Step 5: Solve for x
    x = 14,869,671,737.08/128,114.21
  6. Step 6: Final answer
    x = 116,065.75

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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.