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Finding the Fourth Proportional to 292,079.40, 438,086.70 and 81,738.60

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Solution

The fourth proportional to 292,079.40, 438,086.70 and 81,738.60 is: 122,598.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,079.40 : 438,086.70 = 81,738.60 : x
  2. Step 2: Convert to fraction form
    292,079.40/438,086.70 = 81,738.60/x
  3. Step 3: Cross multiply
    292,079.40x = 438,086.70 × 81,738.60
  4. Step 4: Simplify right side
    292,079.40x = 35,808,593,536.62
  5. Step 5: Solve for x
    x = 35,808,593,536.62/292,079.40
  6. Step 6: Final answer
    x = 122,598.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.