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Finding the Fourth Proportional to 103,993.52, 143,511.08 and 58,681.11

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Solution

The fourth proportional to 103,993.52, 143,511.08 and 58,681.11 is: 80,979.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,993.52 : 143,511.08 = 58,681.11 : x
  2. Step 2: Convert to fraction form
    103,993.52/143,511.08 = 58,681.11/x
  3. Step 3: Cross multiply
    103,993.52x = 143,511.08 × 58,681.11
  4. Step 4: Simplify right side
    103,993.52x = 8,421,388,900.85
  5. Step 5: Solve for x
    x = 8,421,388,900.85/103,993.52
  6. Step 6: Final answer
    x = 80,979.94

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1.5x scale

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.