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Finding the Fourth Proportional to 66,894, 100,389.87 and 53,903.22

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Solution

The fourth proportional to 66,894, 100,389.87 and 53,903.22 is: 80,894.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,894 : 100,389.87 = 53,903.22 : x
  2. Step 2: Convert to fraction form
    66,894/100,389.87 = 53,903.22/x
  3. Step 3: Cross multiply
    66,894x = 100,389.87 × 53,903.22
  4. Step 4: Simplify right side
    66,894x = 5,411,337,248.38
  5. Step 5: Solve for x
    x = 5,411,337,248.38/66,894
  6. Step 6: Final answer
    x = 80,894.21

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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.