Home / 129,315.65-193,721.31-72,985.37

Finding the Fourth Proportional to 129,315.65, 193,721.31 and 72,985.37

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Solution

The fourth proportional to 129,315.65, 193,721.31 and 72,985.37 is: 109,335.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,315.65 : 193,721.31 = 72,985.37 : x
  2. Step 2: Convert to fraction form
    129,315.65/193,721.31 = 72,985.37/x
  3. Step 3: Cross multiply
    129,315.65x = 193,721.31 × 72,985.37
  4. Step 4: Simplify right side
    129,315.65x = 14,138,820,518.63
  5. Step 5: Solve for x
    x = 14,138,820,518.63/129,315.65
  6. Step 6: Final answer
    x = 109,335.73

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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.