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Finding the Fourth Proportional to 152,990.92, 228,994.98 and 81,735.40

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Solution

The fourth proportional to 152,990.92, 228,994.98 and 81,735.40 is: 122,340.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,990.92 : 228,994.98 = 81,735.40 : x
  2. Step 2: Convert to fraction form
    152,990.92/228,994.98 = 81,735.40/x
  3. Step 3: Cross multiply
    152,990.92x = 228,994.98 × 81,735.40
  4. Step 4: Simplify right side
    152,990.92x = 18,716,996,288.29
  5. Step 5: Solve for x
    x = 18,716,996,288.29/152,990.92
  6. Step 6: Final answer
    x = 122,340.57

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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.