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Finding the Fourth Proportional to 58,240, 87,378.48 and 20,799.28

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Solution

The fourth proportional to 58,240, 87,378.48 and 20,799.28 is: 31,205.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,240 : 87,378.48 = 20,799.28 : x
  2. Step 2: Convert to fraction form
    58,240/87,378.48 = 20,799.28/x
  3. Step 3: Cross multiply
    58,240x = 87,378.48 × 20,799.28
  4. Step 4: Simplify right side
    58,240x = 1,817,409,471.49
  5. Step 5: Solve for x
    x = 1,817,409,471.49/58,240
  6. Step 6: Final answer
    x = 31,205.52

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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.