Home / 156,439.53-215,888.21-91,911.47

Finding the Fourth Proportional to 156,439.53, 215,888.21 and 91,911.47

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Solution

The fourth proportional to 156,439.53, 215,888.21 and 91,911.47 is: 126,838.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,439.53 : 215,888.21 = 91,911.47 : x
  2. Step 2: Convert to fraction form
    156,439.53/215,888.21 = 91,911.47/x
  3. Step 3: Cross multiply
    156,439.53x = 215,888.21 × 91,911.47
  4. Step 4: Simplify right side
    156,439.53x = 19,842,601,197.77
  5. Step 5: Solve for x
    x = 19,842,601,197.77/156,439.53
  6. Step 6: Final answer
    x = 126,838.79

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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.