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Finding the Fourth Proportional to 66,379.98, 99,466.29 and 56,478.54

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Solution

The fourth proportional to 66,379.98, 99,466.29 and 56,478.54 is: 84,629.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,379.98 : 99,466.29 = 56,478.54 : x
  2. Step 2: Convert to fraction form
    66,379.98/99,466.29 = 56,478.54/x
  3. Step 3: Cross multiply
    66,379.98x = 99,466.29 × 56,478.54
  4. Step 4: Simplify right side
    66,379.98x = 5,617,710,838.42
  5. Step 5: Solve for x
    x = 5,617,710,838.42/66,379.98
  6. Step 6: Final answer
    x = 84,629.60

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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.