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Finding the Fourth Proportional to 99,624.78, 137,485.71 and 56,603.66

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Solution

The fourth proportional to 99,624.78, 137,485.71 and 56,603.66 is: 78,115.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,624.78 : 137,485.71 = 56,603.66 : x
  2. Step 2: Convert to fraction form
    99,624.78/137,485.71 = 56,603.66/x
  3. Step 3: Cross multiply
    99,624.78x = 137,485.71 × 56,603.66
  4. Step 4: Simplify right side
    99,624.78x = 7,782,193,696.27
  5. Step 5: Solve for x
    x = 7,782,193,696.27/99,624.78
  6. Step 6: Final answer
    x = 78,115.04

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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.