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Finding the Fourth Proportional to 98,497.76, 135,911.08 and 56,057

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Solution

The fourth proportional to 98,497.76, 135,911.08 and 56,057 is: 77,349.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,497.76 : 135,911.08 = 56,057 : x
  2. Step 2: Convert to fraction form
    98,497.76/135,911.08 = 56,057/x
  3. Step 3: Cross multiply
    98,497.76x = 135,911.08 × 56,057
  4. Step 4: Simplify right side
    98,497.76x = 7,618,767,411.56
  5. Step 5: Solve for x
    x = 7,618,767,411.56/98,497.76
  6. Step 6: Final answer
    x = 77,349.65

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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.