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Finding the Fourth Proportional to 149,369.80, 206,127.72 and 81,387.34

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Solution

The fourth proportional to 149,369.80, 206,127.72 and 81,387.34 is: 112,313.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,369.80 : 206,127.72 = 81,387.34 : x
  2. Step 2: Convert to fraction form
    149,369.80/206,127.72 = 81,387.34/x
  3. Step 3: Cross multiply
    149,369.80x = 206,127.72 × 81,387.34
  4. Step 4: Simplify right side
    149,369.80x = 16,776,186,831.06
  5. Step 5: Solve for x
    x = 16,776,186,831.06/149,369.80
  6. Step 6: Final answer
    x = 112,313.11

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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.