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Finding the Fourth Proportional to 102,756.70, 154,135.05 and 79,428.70

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Solution

The fourth proportional to 102,756.70, 154,135.05 and 79,428.70 is: 119,143.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,756.70 : 154,135.05 = 79,428.70 : x
  2. Step 2: Convert to fraction form
    102,756.70/154,135.05 = 79,428.70/x
  3. Step 3: Cross multiply
    102,756.70x = 154,135.05 × 79,428.70
  4. Step 4: Simplify right side
    102,756.70x = 12,242,746,645.94
  5. Step 5: Solve for x
    x = 12,242,746,645.94/102,756.70
  6. Step 6: Final answer
    x = 119,143.05

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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.