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Finding the Fourth Proportional to 100,859.45, 151,312.87 and 56,516.81

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Solution

The fourth proportional to 100,859.45, 151,312.87 and 56,516.81 is: 84,788.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,859.45 : 151,312.87 = 56,516.81 : x
  2. Step 2: Convert to fraction form
    100,859.45/151,312.87 = 56,516.81/x
  3. Step 3: Cross multiply
    100,859.45x = 151,312.87 × 56,516.81
  4. Step 4: Simplify right side
    100,859.45x = 8,551,720,724.34
  5. Step 5: Solve for x
    x = 8,551,720,724.34/100,859.45
  6. Step 6: Final answer
    x = 84,788.49

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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.