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Finding the Fourth Proportional to 138,798.54, 191,527.72 and 80,646.21

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Solution

The fourth proportional to 138,798.54, 191,527.72 and 80,646.21 is: 111,283.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,798.54 : 191,527.72 = 80,646.21 : x
  2. Step 2: Convert to fraction form
    138,798.54/191,527.72 = 80,646.21/x
  3. Step 3: Cross multiply
    138,798.54x = 191,527.72 × 80,646.21
  4. Step 4: Simplify right side
    138,798.54x = 15,445,984,979.96
  5. Step 5: Solve for x
    x = 15,445,984,979.96/138,798.54
  6. Step 6: Final answer
    x = 111,283.48

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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.