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Finding the Fourth Proportional to 56,439.69, 84,664.15 and 28,345.30

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Solution

The fourth proportional to 56,439.69, 84,664.15 and 28,345.30 is: 42,520.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,439.69 : 84,664.15 = 28,345.30 : x
  2. Step 2: Convert to fraction form
    56,439.69/84,664.15 = 28,345.30/x
  3. Step 3: Cross multiply
    56,439.69x = 84,664.15 × 28,345.30
  4. Step 4: Simplify right side
    56,439.69x = 2,399,830,448.47
  5. Step 5: Solve for x
    x = 2,399,830,448.47/56,439.69
  6. Step 6: Final answer
    x = 42,520.26

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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.