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Finding the Fourth Proportional to 268,656.64, 402,970.38 and 81,653.56

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Solution

The fourth proportional to 268,656.64, 402,970.38 and 81,653.56 is: 122,475.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,656.64 : 402,970.38 = 81,653.56 : x
  2. Step 2: Convert to fraction form
    268,656.64/402,970.38 = 81,653.56/x
  3. Step 3: Cross multiply
    268,656.64x = 402,970.38 × 81,653.56
  4. Step 4: Simplify right side
    268,656.64x = 32,903,967,313.11
  5. Step 5: Solve for x
    x = 32,903,967,313.11/268,656.64
  6. Step 6: Final answer
    x = 122,475.91

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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.