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Finding the Fourth Proportional to 72,936.36, 109,464.71 and 56,397.20

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Solution

The fourth proportional to 72,936.36, 109,464.71 and 56,397.20 is: 84,642.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,936.36 : 109,464.71 = 56,397.20 : x
  2. Step 2: Convert to fraction form
    72,936.36/109,464.71 = 56,397.20/x
  3. Step 3: Cross multiply
    72,936.36x = 109,464.71 × 56,397.20
  4. Step 4: Simplify right side
    72,936.36x = 6,173,502,313.50
  5. Step 5: Solve for x
    x = 6,173,502,313.50/72,936.36
  6. Step 6: Final answer
    x = 84,642.31

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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.