Home / 66,139.80-99,222.24-21,779.40

Finding the Fourth Proportional to 66,139.80, 99,222.24 and 21,779.40

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Solution

The fourth proportional to 66,139.80, 99,222.24 and 21,779.40 is: 32,673.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,139.80 : 99,222.24 = 21,779.40 : x
  2. Step 2: Convert to fraction form
    66,139.80/99,222.24 = 21,779.40/x
  3. Step 3: Cross multiply
    66,139.80x = 99,222.24 × 21,779.40
  4. Step 4: Simplify right side
    66,139.80x = 2,161,000,853.86
  5. Step 5: Solve for x
    x = 2,161,000,853.86/66,139.80
  6. Step 6: Final answer
    x = 32,673.23

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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.