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Finding the Fourth Proportional to 145,318.80, 217,816.20 and 56,542.80

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Solution

The fourth proportional to 145,318.80, 217,816.20 and 56,542.80 is: 84,751.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,318.80 : 217,816.20 = 56,542.80 : x
  2. Step 2: Convert to fraction form
    145,318.80/217,816.20 = 56,542.80/x
  3. Step 3: Cross multiply
    145,318.80x = 217,816.20 × 56,542.80
  4. Step 4: Simplify right side
    145,318.80x = 12,315,937,833.36
  5. Step 5: Solve for x
    x = 12,315,937,833.36/145,318.80
  6. Step 6: Final answer
    x = 84,751.17

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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.