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Finding the Fourth Proportional to 256,765.52, 385,070.52 and 69,752.72

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Solution

The fourth proportional to 256,765.52, 385,070.52 and 69,752.72 is: 104,607.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,765.52 : 385,070.52 = 69,752.72 : x
  2. Step 2: Convert to fraction form
    256,765.52/385,070.52 = 69,752.72/x
  3. Step 3: Cross multiply
    256,765.52x = 385,070.52 × 69,752.72
  4. Step 4: Simplify right side
    256,765.52x = 26,859,716,161.81
  5. Step 5: Solve for x
    x = 26,859,716,161.81/256,765.52
  6. Step 6: Final answer
    x = 104,607.96

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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.