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Finding the Fourth Proportional to 72,188.63, 108,301.40 and 27,803.47

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Solution

The fourth proportional to 72,188.63, 108,301.40 and 27,803.47 is: 41,712.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,188.63 : 108,301.40 = 27,803.47 : x
  2. Step 2: Convert to fraction form
    72,188.63/108,301.40 = 27,803.47/x
  3. Step 3: Cross multiply
    72,188.63x = 108,301.40 × 27,803.47
  4. Step 4: Simplify right side
    72,188.63x = 3,011,154,779.81
  5. Step 5: Solve for x
    x = 3,011,154,779.81/72,188.63
  6. Step 6: Final answer
    x = 41,712.31

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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.