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Finding the Fourth Proportional to 60,424, 90,612.86 and 19,888

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Solution

The fourth proportional to 60,424, 90,612.86 and 19,888 is: 29,824.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,424 : 90,612.86 = 19,888 : x
  2. Step 2: Convert to fraction form
    60,424/90,612.86 = 19,888/x
  3. Step 3: Cross multiply
    60,424x = 90,612.86 × 19,888
  4. Step 4: Simplify right side
    60,424x = 1,802,108,559.68
  5. Step 5: Solve for x
    x = 1,802,108,559.68/60,424
  6. Step 6: Final answer
    x = 29,824.38

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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.