Home / 81,646.11-122,437.65-31,719.63

Finding the Fourth Proportional to 81,646.11, 122,437.65 and 31,719.63

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Solution

The fourth proportional to 81,646.11, 122,437.65 and 31,719.63 is: 47,567.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,646.11 : 122,437.65 = 31,719.63 : x
  2. Step 2: Convert to fraction form
    81,646.11/122,437.65 = 31,719.63/x
  3. Step 3: Cross multiply
    81,646.11x = 122,437.65 × 31,719.63
  4. Step 4: Simplify right side
    81,646.11x = 3,883,676,956.07
  5. Step 5: Solve for x
    x = 3,883,676,956.07/81,646.11
  6. Step 6: Final answer
    x = 47,567.20

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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.