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Finding the Fourth Proportional to 318,870.87, 478,373.76 and 105,626.70

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Solution

The fourth proportional to 318,870.87, 478,373.76 and 105,626.70 is: 158,462.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,870.87 : 478,373.76 = 105,626.70 : x
  2. Step 2: Convert to fraction form
    318,870.87/478,373.76 = 105,626.70/x
  3. Step 3: Cross multiply
    318,870.87x = 478,373.76 × 105,626.70
  4. Step 4: Simplify right side
    318,870.87x = 50,529,041,635.39
  5. Step 5: Solve for x
    x = 50,529,041,635.39/318,870.87
  6. Step 6: Final answer
    x = 158,462.39

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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.