Home / 189,420.40-261,365.16-121,449.52

Finding the Fourth Proportional to 189,420.40, 261,365.16 and 121,449.52

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Solution

The fourth proportional to 189,420.40, 261,365.16 and 121,449.52 is: 167,577.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,420.40 : 261,365.16 = 121,449.52 : x
  2. Step 2: Convert to fraction form
    189,420.40/261,365.16 = 121,449.52/x
  3. Step 3: Cross multiply
    189,420.40x = 261,365.16 × 121,449.52
  4. Step 4: Simplify right side
    189,420.40x = 31,742,673,226.72
  5. Step 5: Solve for x
    x = 31,742,673,226.72/189,420.40
  6. Step 6: Final answer
    x = 167,577.90

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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.