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Finding the Fourth Proportional to 72,655.73, 108,917.58 and 64,782.53

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Solution

The fourth proportional to 72,655.73, 108,917.58 and 64,782.53 is: 97,114.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,655.73 : 108,917.58 = 64,782.53 : x
  2. Step 2: Convert to fraction form
    72,655.73/108,917.58 = 64,782.53/x
  3. Step 3: Cross multiply
    72,655.73x = 108,917.58 × 64,782.53
  4. Step 4: Simplify right side
    72,655.73x = 7,055,956,393.88
  5. Step 5: Solve for x
    x = 7,055,956,393.88/72,655.73
  6. Step 6: Final answer
    x = 97,114.93

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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.