Home / 208,629.45-287,908.72-113,136.12

Finding the Fourth Proportional to 208,629.45, 287,908.72 and 113,136.12

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Solution

The fourth proportional to 208,629.45, 287,908.72 and 113,136.12 is: 156,127.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,629.45 : 287,908.72 = 113,136.12 : x
  2. Step 2: Convert to fraction form
    208,629.45/287,908.72 = 113,136.12/x
  3. Step 3: Cross multiply
    208,629.45x = 287,908.72 × 113,136.12
  4. Step 4: Simplify right side
    208,629.45x = 32,572,875,212.13
  5. Step 5: Solve for x
    x = 32,572,875,212.13/208,629.45
  6. Step 6: Final answer
    x = 156,127.89

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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.