Home / 138,545.66-191,181.48-78,131.18

Finding the Fourth Proportional to 138,545.66, 191,181.48 and 78,131.18

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Solution

The fourth proportional to 138,545.66, 191,181.48 and 78,131.18 is: 107,814.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,545.66 : 191,181.48 = 78,131.18 : x
  2. Step 2: Convert to fraction form
    138,545.66/191,181.48 = 78,131.18/x
  3. Step 3: Cross multiply
    138,545.66x = 191,181.48 × 78,131.18
  4. Step 4: Simplify right side
    138,545.66x = 14,937,234,626.55
  5. Step 5: Solve for x
    x = 14,937,234,626.55/138,545.66
  6. Step 6: Final answer
    x = 107,814.53

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1.5x scale

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.