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Finding the Fourth Proportional to 60,520.48, 90,783.15 and 21,081.58

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Solution

The fourth proportional to 60,520.48, 90,783.15 and 21,081.58 is: 31,623.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,520.48 : 90,783.15 = 21,081.58 : x
  2. Step 2: Convert to fraction form
    60,520.48/90,783.15 = 21,081.58/x
  3. Step 3: Cross multiply
    60,520.48x = 90,783.15 × 21,081.58
  4. Step 4: Simplify right side
    60,520.48x = 1,913,852,239.38
  5. Step 5: Solve for x
    x = 1,913,852,239.38/60,520.48
  6. Step 6: Final answer
    x = 31,623.22

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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.