Home / 156,315.20-215,812.80-120,437.12

Finding the Fourth Proportional to 156,315.20, 215,812.80 and 120,437.12

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Solution

The fourth proportional to 156,315.20, 215,812.80 and 120,437.12 is: 166,278.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,315.20 : 215,812.80 = 120,437.12 : x
  2. Step 2: Convert to fraction form
    156,315.20/215,812.80 = 120,437.12/x
  3. Step 3: Cross multiply
    156,315.20x = 215,812.80 × 120,437.12
  4. Step 4: Simplify right side
    156,315.20x = 25,991,872,091.14
  5. Step 5: Solve for x
    x = 25,991,872,091.14/156,315.20
  6. Step 6: Final answer
    x = 166,278.60

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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.