Home / 90,866.70-136,381.05-53,379.90

Finding the Fourth Proportional to 90,866.70, 136,381.05 and 53,379.90

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Solution

The fourth proportional to 90,866.70, 136,381.05 and 53,379.90 is: 80,117.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,866.70 : 136,381.05 = 53,379.90 : x
  2. Step 2: Convert to fraction form
    90,866.70/136,381.05 = 53,379.90/x
  3. Step 3: Cross multiply
    90,866.70x = 136,381.05 × 53,379.90
  4. Step 4: Simplify right side
    90,866.70x = 7,280,006,810.90
  5. Step 5: Solve for x
    x = 7,280,006,810.90/90,866.70
  6. Step 6: Final answer
    x = 80,117.43

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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.