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Finding the Fourth Proportional to 111,492.86, 153,849.84 and 66,163.01

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Solution

The fourth proportional to 111,492.86, 153,849.84 and 66,163.01 is: 91,298.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,492.86 : 153,849.84 = 66,163.01 : x
  2. Step 2: Convert to fraction form
    111,492.86/153,849.84 = 66,163.01/x
  3. Step 3: Cross multiply
    111,492.86x = 153,849.84 × 66,163.01
  4. Step 4: Simplify right side
    111,492.86x = 10,179,168,502.42
  5. Step 5: Solve for x
    x = 10,179,168,502.42/111,492.86
  6. Step 6: Final answer
    x = 91,298.84

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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.