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Finding the Fourth Proportional to 72,652.48, 108,912.71 and 64,779.28

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Solution

The fourth proportional to 72,652.48, 108,912.71 and 64,779.28 is: 97,110.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,652.48 : 108,912.71 = 64,779.28 : x
  2. Step 2: Convert to fraction form
    72,652.48/108,912.71 = 64,779.28/x
  3. Step 3: Cross multiply
    72,652.48x = 108,912.71 × 64,779.28
  4. Step 4: Simplify right side
    72,652.48x = 7,055,286,612.75
  5. Step 5: Solve for x
    x = 7,055,286,612.75/72,652.48
  6. Step 6: Final answer
    x = 97,110.06

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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.