Home / 72,581.06-108,871.59-19,990.55

Finding the Fourth Proportional to 72,581.06, 108,871.59 and 19,990.55

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Solution

The fourth proportional to 72,581.06, 108,871.59 and 19,990.55 is: 29,985.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,581.06 : 108,871.59 = 19,990.55 : x
  2. Step 2: Convert to fraction form
    72,581.06/108,871.59 = 19,990.55/x
  3. Step 3: Cross multiply
    72,581.06x = 108,871.59 × 19,990.55
  4. Step 4: Simplify right side
    72,581.06x = 2,176,402,698.22
  5. Step 5: Solve for x
    x = 2,176,402,698.22/72,581.06
  6. Step 6: Final answer
    x = 29,985.82

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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.