Home / 208,811.12-288,156.29-122,779.80

Finding the Fourth Proportional to 208,811.12, 288,156.29 and 122,779.80

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Solution

The fourth proportional to 208,811.12, 288,156.29 and 122,779.80 is: 169,434.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,811.12 : 288,156.29 = 122,779.80 : x
  2. Step 2: Convert to fraction form
    208,811.12/288,156.29 = 122,779.80/x
  3. Step 3: Cross multiply
    208,811.12x = 288,156.29 × 122,779.80
  4. Step 4: Simplify right side
    208,811.12x = 35,379,771,041.04
  5. Step 5: Solve for x
    x = 35,379,771,041.04/208,811.12
  6. Step 6: Final answer
    x = 169,434.33

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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.