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Finding the Fourth Proportional to 58,412.68, 87,630.76 and 20,975.69

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Solution

The fourth proportional to 58,412.68, 87,630.76 and 20,975.69 is: 31,467.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,412.68 : 87,630.76 = 20,975.69 : x
  2. Step 2: Convert to fraction form
    58,412.68/87,630.76 = 20,975.69/x
  3. Step 3: Cross multiply
    58,412.68x = 87,630.76 × 20,975.69
  4. Step 4: Simplify right side
    58,412.68x = 1,838,115,901.52
  5. Step 5: Solve for x
    x = 1,838,115,901.52/58,412.68
  6. Step 6: Final answer
    x = 31,467.75

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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.