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Finding the Fourth Proportional to 138,703.56, 191,377.62 and 84,254.64

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Solution

The fourth proportional to 138,703.56, 191,377.62 and 84,254.64 is: 116,251.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,703.56 : 191,377.62 = 84,254.64 : x
  2. Step 2: Convert to fraction form
    138,703.56/191,377.62 = 84,254.64/x
  3. Step 3: Cross multiply
    138,703.56x = 191,377.62 × 84,254.64
  4. Step 4: Simplify right side
    138,703.56x = 16,124,452,477.16
  5. Step 5: Solve for x
    x = 16,124,452,477.16/138,703.56
  6. Step 6: Final answer
    x = 116,251.18

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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.