Home / 137,485.47-189,726.53-80,121.07

Finding the Fourth Proportional to 137,485.47, 189,726.53 and 80,121.07

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Solution

The fourth proportional to 137,485.47, 189,726.53 and 80,121.07 is: 110,565.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,485.47 : 189,726.53 = 80,121.07 : x
  2. Step 2: Convert to fraction form
    137,485.47/189,726.53 = 80,121.07/x
  3. Step 3: Cross multiply
    137,485.47x = 189,726.53 × 80,121.07
  4. Step 4: Simplify right side
    137,485.47x = 15,201,092,590.99
  5. Step 5: Solve for x
    x = 15,201,092,590.99/137,485.47
  6. Step 6: Final answer
    x = 110,565.08

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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.