Home / 149,018.16-205,640.96-81,950.16

Finding the Fourth Proportional to 149,018.16, 205,640.96 and 81,950.16

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Solution

The fourth proportional to 149,018.16, 205,640.96 and 81,950.16 is: 113,088.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,018.16 : 205,640.96 = 81,950.16 : x
  2. Step 2: Convert to fraction form
    149,018.16/205,640.96 = 81,950.16/x
  3. Step 3: Cross multiply
    149,018.16x = 205,640.96 × 81,950.16
  4. Step 4: Simplify right side
    149,018.16x = 16,852,309,574.55
  5. Step 5: Solve for x
    x = 16,852,309,574.55/149,018.16
  6. Step 6: Final answer
    x = 113,088.97

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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.