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Finding the Fourth Proportional to 72,877.91, 109,316.88 and 56,262.20

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Solution

The fourth proportional to 72,877.91, 109,316.88 and 56,262.20 is: 84,393.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,877.91 : 109,316.88 = 56,262.20 : x
  2. Step 2: Convert to fraction form
    72,877.91/109,316.88 = 56,262.20/x
  3. Step 3: Cross multiply
    72,877.91x = 109,316.88 × 56,262.20
  4. Step 4: Simplify right side
    72,877.91x = 6,150,407,619.35
  5. Step 5: Solve for x
    x = 6,150,407,619.35/72,877.91
  6. Step 6: Final answer
    x = 84,393.31

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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.