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Finding the Fourth Proportional to 142,687.60, 214,031.40 and 72,703.60

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Solution

The fourth proportional to 142,687.60, 214,031.40 and 72,703.60 is: 109,055.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,687.60 : 214,031.40 = 72,703.60 : x
  2. Step 2: Convert to fraction form
    142,687.60/214,031.40 = 72,703.60/x
  3. Step 3: Cross multiply
    142,687.60x = 214,031.40 × 72,703.60
  4. Step 4: Simplify right side
    142,687.60x = 15,560,853,293.04
  5. Step 5: Solve for x
    x = 15,560,853,293.04/142,687.60
  6. Step 6: Final answer
    x = 109,055.40

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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.