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Finding the Fourth Proportional to 128,026.52, 191,782.56 and 63,790.91

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Solution

The fourth proportional to 128,026.52, 191,782.56 and 63,790.91 is: 95,558.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,026.52 : 191,782.56 = 63,790.91 : x
  2. Step 2: Convert to fraction form
    128,026.52/191,782.56 = 63,790.91/x
  3. Step 3: Cross multiply
    128,026.52x = 191,782.56 × 63,790.91
  4. Step 4: Simplify right side
    128,026.52x = 12,233,984,024.53
  5. Step 5: Solve for x
    x = 12,233,984,024.53/128,026.52
  6. Step 6: Final answer
    x = 95,558.20

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1.5x scale

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.