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Finding the Fourth Proportional to 72,116.64, 108,174.96 and 68,278.32

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Solution

The fourth proportional to 72,116.64, 108,174.96 and 68,278.32 is: 102,417.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,116.64 : 108,174.96 = 68,278.32 : x
  2. Step 2: Convert to fraction form
    72,116.64/108,174.96 = 68,278.32/x
  3. Step 3: Cross multiply
    72,116.64x = 108,174.96 × 68,278.32
  4. Step 4: Simplify right side
    72,116.64x = 7,386,004,534.87
  5. Step 5: Solve for x
    x = 7,386,004,534.87/72,116.64
  6. Step 6: Final answer
    x = 102,417.48

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1.5x scale

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.