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Finding the Fourth Proportional to 129,988.89, 194,990.29 and 36,501.93

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Solution

The fourth proportional to 129,988.89, 194,990.29 and 36,501.93 is: 54,754.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,988.89 : 194,990.29 = 36,501.93 : x
  2. Step 2: Convert to fraction form
    129,988.89/194,990.29 = 36,501.93/x
  3. Step 3: Cross multiply
    129,988.89x = 194,990.29 × 36,501.93
  4. Step 4: Simplify right side
    129,988.89x = 7,117,521,825.00
  5. Step 5: Solve for x
    x = 7,117,521,825.00/129,988.89
  6. Step 6: Final answer
    x = 54,754.85

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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.