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Finding the Fourth Proportional to 125,190.50, 187,785.99 and 30,420.77

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Solution

The fourth proportional to 125,190.50, 187,785.99 and 30,420.77 is: 45,631.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,190.50 : 187,785.99 = 30,420.77 : x
  2. Step 2: Convert to fraction form
    125,190.50/187,785.99 = 30,420.77/x
  3. Step 3: Cross multiply
    125,190.50x = 187,785.99 × 30,420.77
  4. Step 4: Simplify right side
    125,190.50x = 5,712,594,411.01
  5. Step 5: Solve for x
    x = 5,712,594,411.01/125,190.50
  6. Step 6: Final answer
    x = 45,631.21

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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.