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Finding the Fourth Proportional to 72,654.66, 108,981.81 and 20,063.99

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Solution

The fourth proportional to 72,654.66, 108,981.81 and 20,063.99 is: 30,095.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,654.66 : 108,981.81 = 20,063.99 : x
  2. Step 2: Convert to fraction form
    72,654.66/108,981.81 = 20,063.99/x
  3. Step 3: Cross multiply
    72,654.66x = 108,981.81 × 20,063.99
  4. Step 4: Simplify right side
    72,654.66x = 2,186,609,401.11
  5. Step 5: Solve for x
    x = 2,186,609,401.11/72,654.66
  6. Step 6: Final answer
    x = 30,095.93

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1.5x scale

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.