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Finding the Fourth Proportional to 66,421.86, 99,492.27 and 53,717.10

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Solution

The fourth proportional to 66,421.86, 99,492.27 and 53,717.10 is: 80,462.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,421.86 : 99,492.27 = 53,717.10 : x
  2. Step 2: Convert to fraction form
    66,421.86/99,492.27 = 53,717.10/x
  3. Step 3: Cross multiply
    66,421.86x = 99,492.27 × 53,717.10
  4. Step 4: Simplify right side
    66,421.86x = 5,344,435,719.36
  5. Step 5: Solve for x
    x = 5,344,435,719.36/66,421.86
  6. Step 6: Final answer
    x = 80,462.01

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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.