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Finding the Fourth Proportional to 111,803.52, 154,288.80 and 61,502.16

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Solution

The fourth proportional to 111,803.52, 154,288.80 and 61,502.16 is: 84,872.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,803.52 : 154,288.80 = 61,502.16 : x
  2. Step 2: Convert to fraction form
    111,803.52/154,288.80 = 61,502.16/x
  3. Step 3: Cross multiply
    111,803.52x = 154,288.80 × 61,502.16
  4. Step 4: Simplify right side
    111,803.52x = 9,489,094,463.81
  5. Step 5: Solve for x
    x = 9,489,094,463.81/111,803.52
  6. Step 6: Final answer
    x = 84,872.95

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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.