Home / 156,143.88-215,407.62-99,520.02

Finding the Fourth Proportional to 156,143.88, 215,407.62 and 99,520.02

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Solution

The fourth proportional to 156,143.88, 215,407.62 and 99,520.02 is: 137,292.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,143.88 : 215,407.62 = 99,520.02 : x
  2. Step 2: Convert to fraction form
    156,143.88/215,407.62 = 99,520.02/x
  3. Step 3: Cross multiply
    156,143.88x = 215,407.62 × 99,520.02
  4. Step 4: Simplify right side
    156,143.88x = 21,437,370,650.55
  5. Step 5: Solve for x
    x = 21,437,370,650.55/156,143.88
  6. Step 6: Final answer
    x = 137,292.42

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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.