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Finding the Fourth Proportional to 142,908.60, 214,217.10 and 83,713.80

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Solution

The fourth proportional to 142,908.60, 214,217.10 and 83,713.80 is: 125,485.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,908.60 : 214,217.10 = 83,713.80 : x
  2. Step 2: Convert to fraction form
    142,908.60/214,217.10 = 83,713.80/x
  3. Step 3: Cross multiply
    142,908.60x = 214,217.10 × 83,713.80
  4. Step 4: Simplify right side
    142,908.60x = 17,932,927,465.98
  5. Step 5: Solve for x
    x = 17,932,927,465.98/142,908.60
  6. Step 6: Final answer
    x = 125,485.29

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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.