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Finding the Fourth Proportional to 91,603.80, 137,211.30 and 76,051.80

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Solution

The fourth proportional to 91,603.80, 137,211.30 and 76,051.80 is: 113,916.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,603.80 : 137,211.30 = 76,051.80 : x
  2. Step 2: Convert to fraction form
    91,603.80/137,211.30 = 76,051.80/x
  3. Step 3: Cross multiply
    91,603.80x = 137,211.30 × 76,051.80
  4. Step 4: Simplify right side
    91,603.80x = 10,435,166,345.34
  5. Step 5: Solve for x
    x = 10,435,166,345.34/91,603.80
  6. Step 6: Final answer
    x = 113,916.30

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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.