Home / 189,264.18-261,118.61-121,318.62

Finding the Fourth Proportional to 189,264.18, 261,118.61 and 121,318.62

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Solution

The fourth proportional to 189,264.18, 261,118.61 and 121,318.62 is: 167,377.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,264.18 : 261,118.61 = 121,318.62 : x
  2. Step 2: Convert to fraction form
    189,264.18/261,118.61 = 121,318.62/x
  3. Step 3: Cross multiply
    189,264.18x = 261,118.61 × 121,318.62
  4. Step 4: Simplify right side
    189,264.18x = 31,678,547,509.33
  5. Step 5: Solve for x
    x = 31,678,547,509.33/189,264.18
  6. Step 6: Final answer
    x = 167,377.41

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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.