Home / 149,428.71-206,211.78-81,445.74

Finding the Fourth Proportional to 149,428.71, 206,211.78 and 81,445.74

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Solution

The fourth proportional to 149,428.71, 206,211.78 and 81,445.74 is: 112,395.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,428.71 : 206,211.78 = 81,445.74 : x
  2. Step 2: Convert to fraction form
    149,428.71/206,211.78 = 81,445.74/x
  3. Step 3: Cross multiply
    149,428.71x = 206,211.78 × 81,445.74
  4. Step 4: Simplify right side
    149,428.71x = 16,795,071,018.82
  5. Step 5: Solve for x
    x = 16,795,071,018.82/149,428.71
  6. Step 6: Final answer
    x = 112,395.21

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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.