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Finding the Fourth Proportional to 138,482.19, 191,105.55 and 74,820.11

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Solution

The fourth proportional to 138,482.19, 191,105.55 and 74,820.11 is: 103,251.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,482.19 : 191,105.55 = 74,820.11 : x
  2. Step 2: Convert to fraction form
    138,482.19/191,105.55 = 74,820.11/x
  3. Step 3: Cross multiply
    138,482.19x = 191,105.55 × 74,820.11
  4. Step 4: Simplify right side
    138,482.19x = 14,298,537,317.08
  5. Step 5: Solve for x
    x = 14,298,537,317.08/138,482.19
  6. Step 6: Final answer
    x = 103,251.81

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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.