Home / 138,982.56-191,792.98-78,545.22

Finding the Fourth Proportional to 138,982.56, 191,792.98 and 78,545.22

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Solution

The fourth proportional to 138,982.56, 191,792.98 and 78,545.22 is: 108,390.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,982.56 : 191,792.98 = 78,545.22 : x
  2. Step 2: Convert to fraction form
    138,982.56/191,792.98 = 78,545.22/x
  3. Step 3: Cross multiply
    138,982.56x = 191,792.98 × 78,545.22
  4. Step 4: Simplify right side
    138,982.56x = 15,064,421,808.56
  5. Step 5: Solve for x
    x = 15,064,421,808.56/138,982.56
  6. Step 6: Final answer
    x = 108,390.73

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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.