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Finding the Fourth Proportional to 72,908.13, 100,558.89 and 64,741.62

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Solution

The fourth proportional to 72,908.13, 100,558.89 and 64,741.62 is: 89,295.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,908.13 : 100,558.89 = 64,741.62 : x
  2. Step 2: Convert to fraction form
    72,908.13/100,558.89 = 64,741.62/x
  3. Step 3: Cross multiply
    72,908.13x = 100,558.89 × 64,741.62
  4. Step 4: Simplify right side
    72,908.13x = 6,510,345,444.00
  5. Step 5: Solve for x
    x = 6,510,345,444.00/72,908.13
  6. Step 6: Final answer
    x = 89,295.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.