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Finding the Fourth Proportional to 111,803.68, 154,285.92 and 61,502.68

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Solution

The fourth proportional to 111,803.68, 154,285.92 and 61,502.68 is: 84,871.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,803.68 : 154,285.92 = 61,502.68 : x
  2. Step 2: Convert to fraction form
    111,803.68/154,285.92 = 61,502.68/x
  3. Step 3: Cross multiply
    111,803.68x = 154,285.92 × 61,502.68
  4. Step 4: Simplify right side
    111,803.68x = 9,488,997,566.27
  5. Step 5: Solve for x
    x = 9,488,997,566.27/111,803.68
  6. Step 6: Final answer
    x = 84,871.96

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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.