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Finding the Fourth Proportional to 128,078.10, 191,859.93 and 63,842.54

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Solution

The fourth proportional to 128,078.10, 191,859.93 and 63,842.54 is: 95,635.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,078.10 : 191,859.93 = 63,842.54 : x
  2. Step 2: Convert to fraction form
    128,078.10/191,859.93 = 63,842.54/x
  3. Step 3: Cross multiply
    128,078.10x = 191,859.93 × 63,842.54
  4. Step 4: Simplify right side
    128,078.10x = 12,248,824,296.12
  5. Step 5: Solve for x
    x = 12,248,824,296.12/128,078.10
  6. Step 6: Final answer
    x = 95,635.59

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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.