Home / 128,927.84-193,391.50-72,742.45

Finding the Fourth Proportional to 128,927.84, 193,391.50 and 72,742.45

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Solution

The fourth proportional to 128,927.84, 193,391.50 and 72,742.45 is: 109,113.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,927.84 : 193,391.50 = 72,742.45 : x
  2. Step 2: Convert to fraction form
    128,927.84/193,391.50 = 72,742.45/x
  3. Step 3: Cross multiply
    128,927.84x = 193,391.50 × 72,742.45
  4. Step 4: Simplify right side
    128,927.84x = 14,067,771,519.18
  5. Step 5: Solve for x
    x = 14,067,771,519.18/128,927.84
  6. Step 6: Final answer
    x = 109,113.53

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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.