Home / 128,638.10-192,975.83-39,898.76

Finding the Fourth Proportional to 128,638.10, 192,975.83 and 39,898.76

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Solution

The fourth proportional to 128,638.10, 192,975.83 and 39,898.76 is: 59,853.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,638.10 : 192,975.83 = 39,898.76 : x
  2. Step 2: Convert to fraction form
    128,638.10/192,975.83 = 39,898.76/x
  3. Step 3: Cross multiply
    128,638.10x = 192,975.83 × 39,898.76
  4. Step 4: Simplify right side
    128,638.10x = 7,699,495,461.84
  5. Step 5: Solve for x
    x = 7,699,495,461.84/128,638.10
  6. Step 6: Final answer
    x = 59,853.93

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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.