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Finding the Fourth Proportional to 138,482.54, 191,105.97 and 74,820.32

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Solution

The fourth proportional to 138,482.54, 191,105.97 and 74,820.32 is: 103,252.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,482.54 : 191,105.97 = 74,820.32 : x
  2. Step 2: Convert to fraction form
    138,482.54/191,105.97 = 74,820.32/x
  3. Step 3: Cross multiply
    138,482.54x = 191,105.97 × 74,820.32
  4. Step 4: Simplify right side
    138,482.54x = 14,298,609,829.31
  5. Step 5: Solve for x
    x = 14,298,609,829.31/138,482.54
  6. Step 6: Final answer
    x = 103,252.08

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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.