Home / 155,104.80-213,990.11-101,421.24

Finding the Fourth Proportional to 155,104.80, 213,990.11 and 101,421.24

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Solution

The fourth proportional to 155,104.80, 213,990.11 and 101,421.24 is: 139,925.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,104.80 : 213,990.11 = 101,421.24 : x
  2. Step 2: Convert to fraction form
    155,104.80/213,990.11 = 101,421.24/x
  3. Step 3: Cross multiply
    155,104.80x = 213,990.11 × 101,421.24
  4. Step 4: Simplify right side
    155,104.80x = 21,703,141,796.83
  5. Step 5: Solve for x
    x = 21,703,141,796.83/155,104.80
  6. Step 6: Final answer
    x = 139,925.66

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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.