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Finding the Fourth Proportional to 103,681.52, 143,124.64 and 69,709.72

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Solution

The fourth proportional to 103,681.52, 143,124.64 and 69,709.72 is: 96,229.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,681.52 : 143,124.64 = 69,709.72 : x
  2. Step 2: Convert to fraction form
    103,681.52/143,124.64 = 69,709.72/x
  3. Step 3: Cross multiply
    103,681.52x = 143,124.64 × 69,709.72
  4. Step 4: Simplify right side
    103,681.52x = 9,977,178,579.50
  5. Step 5: Solve for x
    x = 9,977,178,579.50/103,681.52
  6. Step 6: Final answer
    x = 96,229.09

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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.